Antalova, A., Viktorinova, B.: 1991, `LDE flares in the 20th solar cycle. 1.
Comparison of the Time Behaviour of H-alpha Grouped and LDE flares', Bull.
Astron. Inst. Czechosl. 42, 133-144.

Antalova, A.: 1991, `Catalogue of LDE flares (1989 - 1990)', Contrib. Astron.
Obs. Skalnate Pleso 21, 205-292.

Antalova, A.: 1991, `The Relation of the Sunspot Magnetic Field and
Penumbra-umbra radius ratio', Bull. Astron. Inst. Czechosl. 42, 316-320.

Babadzhanov, P.B., Hajduk, A., Obrubov, J.V., Pushkarev, A.N.: 1991,
`Evoljucija meteornogo roja komety Galeja', Astron. Vestnik AN SSSR 25,
208-216.

Badalyan, O.G., Livshits, M.A., Sykora, J.: 1991, `Polarization of the corona
during the maximum of the solar cycle', Adv. Space Res. 11, 173-175.

Bakos, G.A., Horak, T.B., Tremko, J.: 1991, `New photometry of AW UMa and
interpretation of time dependent variations of observed light curves', Bull.
Astron. Inst. Czechosl. 42, 331-344.

Bakos, G.A., Tremko, J.: 1991, `A photometric and spectroscopic study of delta
2 Lyr', Contrib. Astron. Obs. Skalnate Pleso 21, 99-106.

Bakos, G.A., Tremko, J.: 1991, `Photometry and spectroscopy of gamma
Herculis', Contrib. Astron. Obs. Skalnate Pleso 21, 7-14.

Bode, M., Roberts, J., Ivison, R., Meaburn, J., Skopal, A.: 1991, `Echelle
spectroscopy of the symbiotic star CH Cygni through quiescence', Mon. Not. R.
Astron. Soc. 253, 80-88.

Budaj, J., Zboril, J., Zverko, J.: 1991, `Spectroscopic study of a mildly
peculiar A star 68 Ori', Bull. Astron. Inst. Czechosl. 42, 350-354.

Buzasi, J., Klocok, L., Rybansky, M.: 1991, `Druzicovy koronograf pre
KORONAS-I', JEMNA MECHANIKA A OPTIKA 10, 257-258.

Carusi, A., Kresak, L., Kresakova, M., Valsecchi, G.B.: 1991, `Observations of
periodic comet d'Arrest in 1678 and implications for its evolutionary
history', Astron. Astrophys. 252, 377-384.

Carusi, A., Kresak, L., Kresakova, M., Valsecchi, G.B.: 1991, `Periodic comet
d'Arrest = comet La Hire 1678', IAU Circ.

Cervak, G., Fabricius, J., Kornos, L., Pittich, E.M., Rychtarcik, P., Svoren,
J.: 1991, `Precise positions of comets', Minor Planet Circ., 17485-17489.

Cervak, G., Svoren, J., Rychtarcik, P., Pittich, E.M.: 1991, `Precise
positions of comets', Minor Planet Circ., 18489-18492.

Chochol, D., Skopal, A.: 1991, `Photoelectric photometry of eclipses of the
symbiotic binary EG Andromedae', Astrofiziceski isledovania 6, 99-102.

Grygar, J., Hric, L., Komzik, R., Sima, Z.: 1991, `Direct detection of the
secondary spectrum of the interacting eclipsing binary TX UMa', Astrophys.
Space Sci. 185, 189-193.

Hajduk, A., Hajdukova, M.: 1991, `Pochodzenie rojow meteorowych', in: Dynamika
Malych Cial Ukladu Slonecznego, PAN Warzsawa, Warzsawa, pp. 35-41.

Hajduk, A.: 1991, `Evolution of cometary debris: Physical aspects', in: Comets
in Post-Halley Era, eds. R. L. Newburn, M. Neugebauer, J. Rahe, Kluver Acad.
Publ., Dordrecht, pp. 593-606.

Hajduk, A.: 1991, `K problemu urcenia hustoty castic medziplanetarnej hmoty a
funkcie hmotnosti', Meteoricke spravy 12, 44-45.

Hajduk, A.: 1991, `Mass distribution and bulk density distribution of
interplanetary dust', in: Origin and Evolution of Interplanetary Dust, eds. A.
Ch. Levasseur-Regourd, H. Hasegawa, Kluwer Acad. Publ., Dordrecht, pp. 331-334.

Hajdukova, M., Hajduk, A.: 1991, `Lifetime of meteor streams associated with
comet Halley', in: Origin and Evolution of Interplanetary Dust, eds. A. Ch.
Levasseur-Regourd, H. Hasegawa, Kluwer Acad. Publ., Dordrecht, pp. 323-326.

Hajdukova, M., Hajduk, A.: 1991, `Ubytok hmotnosti komet a tok castic v prude
ako kriteria veku', Meteoricke spravy 12, 46-47.

Hric, L., Skopal, A., Urban, Z., Dapergolas, A., Hanzl, D., Isles, J.E.,
Niarchos, P., Papousek, J., Pigulski, A., Velic, Z.: 1991, `Photometry of
symbiotic stars - an international campaign. II', Contrib. Astron. Obs.
Skalnate Pleso 21, 303-331.

Hric, L., Urban, Z.: 1991, `The symbiotic-like/cataclysmic triple system 4 Dra
(= CQ Dra): Detection of a post-periastron passage brightening', Inf. Bull.
Variable Stars 3683, 1-4.

Hric, L.: 1991, `Binary peculiar star omega UMa - long-term variations of
orbital elements', Astrophysical Investigations 6, 95-98.

Hric, L.: 1991, `Diskusia k otazkam tykajucim sa moznosti zivota vo vesmire',
in: Vesmir a vyvoj, ed. J. Dubnicka, Filozoficky ustav SAV, Bratislava, pp.
172-174.

Hric, L.: 1991, `Premenne hviezdy', in: Astronomicka rocenka 1992, ed. E.
Pittich, SUAA Hurbanovo, Nitra, pp. 164-179.

Jones, W., Kingsley, S.P., Cevolani, G., Hajduk, A.: 1991, `A forward scatter
CW meteor radar experiment', Nuovo Cimento C 14, 203-206.

Kapisinsky, I.: 1991, `Katalog pylu kosmicznego', in: Dynamika Malych Cial
Ukladu Slonecznego, ed. K. Ziolkowski, PAN, Warszawa, pp. 99-104.

Kocifaj, M., Lukac, J.: 1991, `Aerosol structure determination from
measurements of skylight at the Lomnicky Stit', in: Proceedings of
International Conference, pp. 278-283.

Kreiner, J.M., Tremko, J.: 1991, `Study of period changes and possible
light-time effect in ZZ Cas', Bull. Astron. Inst. Czechosl. 42, 345-349.

Kresak, L., Kresakova, M.: 1991, `Early and unidentified apparitions of
short-period comets', Astron. Astrophys. 251, 331-338.

Kresak, L.: 1991, `Evidence for physical aging of periodic comets', in: Comets
in the Post-Halley Era, eds. R. L. Newburn, M. Neugebauer, J. Rahe, Kluwer,
Dordrecht, pp. 607-628.

Kresak, L.: 1991, `The aging of comet Halley and other periodic comets', in:
Comet Halley 1986-World-wide Investigations, Results and Interpretations, ed.
J. W. Mason, Chichester, pp. 259-270.

Krivsky, L., Rybansky, M., Rusin, V.: 1991, `Flares of Radio Type II and
Coronal Emission in the Course of Cycle No 20', Sol. Phys. 133, 399-402.

Kubacek, D.: 1991, `Komety roka 1990', in: Astronomicka rocenka 1992, ed. E.
Pittich, SUAA, Hurbanovo, pp. 224-239.

Kubacek, D.: 1991, `Komety', in: Astronomicka rocenka 1992, ed. E. Pittich,
SUAA, Hurbanovo, pp. 106-127.

Kucera, A., Scherbakova, Z.A., Baranovsky, E.A.: 1991, `Height-Dependent Solar
Plage Temperature Distribution.', in: Proceedings of the International
Conference "Mechanisms of Chromospheric and Coronal Heating"., eds. P.
Ulmschneider, E. R. Priest, R. Rosner, Springer-Verlag, Berlin Heidelberg, pp.
109-112.

Kulcar, L., Sykora, J., Letfus, V.: 1991, `Monthly data on the green corona
brightness in the period 1947-1976', Contrib. Astron. Obs. Skalnate Pleso 21,
65-98.

Kuschnig, R., Weiss, W.W., Kreidl, T.J., Bus, S.J., Osip, D.J., Huang, L.,
Sareyan, J.-P., Alvarez, A., Bedolla, S.G., Zverko, J., Ziznovsky, J.,
Hempelmann, A., Panov, K., Polosukhina, N.S., Mironov, A.A., Kusakin, A.V.,
Sterken, Ch., Belmonte, J.A., Rool, J.: 1991, `Maia variables - revived? 1988
and 1989 photometry of ET And', in: Confrontation between stellar pulsation
and evolution, eds. C. Cacciari, G. Clementini, Bologna, pp. 348-?.

Lindblad, B.A., Porubcan, V.: 1991, `The orbit of the Lyrid meteor stream',
Bull. Astron. Inst. Czechosl. 42, 354-359.

Markova, E., Vyskocil, L., Rusin, V., Rybansky, M.: 1991, `The Solar Corona on
July 22, 1990', Sol. dannye 11, 95-97.

Mayer, P., Hadrava, P., Harmanec, P., Chochol, D.: 1991, `New data on the
eclipsing binary V 1765 Cyg (HR 7551) and improved orbital and light curve
solutions.', Bull. Astron. Insts. Czechosl. 42, 230-240.

Mayer, P., Wolf, M., Tremko, J., Niarchos, P.G.: 1991, `New times of minima
and ephemeris of several early-type eclipsing binaries', Bull. Astron. Inst.
Czechosl. 42, 225-229.

Neslusan, L.: 1991, `Analyza smerovosti afelii dlhoperiodickych komet ako
funkcia drahovych elementov', Meteoricke spravy 12, 7-12.

Neslusan, L.: 1991, `Poznamka k procesu vyvrhovania komet z oblasti Urana a
Neptuna', Meteoricke spravy 12, 13-16.

Ogir, M.B., Antalova, A., Bendik, P.: 1991, `Long-decay soft X-ray flares. 4.
Contact Arcade 1B/X3 LDE Flare 1982 June 4, 13:13 UT', Bull. Astron. Inst.
Czechosl. 42, 31-38.

Parisi, M., Storini, M., Borello Filisetti, O., Mussino, V., Sykora, J.: 1991,
`Solar cycle (corona) effects and cosmic-ray modulation', in: Scientific
Papers 1991, ed. P. Bonifazi, Istituto di Fisica dello Spazio Interplanetario,
CNR, Roma, pp. 416.

Pittich, E.: 1991, `Cas', in: Astronomicka rocenka 1992, ed. E. Pittich, SUAA
Hurbanovo, Hurbanovo, pp. 3-10.

Pittich, E.: 1991, `Elongacie a jasnosti', in: Astronomicka rocenka 1992, ed.
E. Pittich, SUUA Hurbanovo, Hurbanovo, pp. 96-99.

Pittich, E.: 1991, `Galileiho mesiace', in: Astronomicka rocenka 1992, ed. E.
Pittich, SUAA Hurbanovo, Hurbanovo, pp. 142-155.

Pittich, E.: 1991, `Mesiac kratko po nove', in: Astronomicka rocenka 1992, ed.
E. Pittich, SUAA Hurbanovo, Hurbanovo, pp. 101-103.

Pittich, E.: 1991, `Obloha od januara do decembra', in: Astronomicka rocenka
1992, ed. E. Pittich, SUAA Hurbanovo, Hurbanovo, pp. 11-89.

Pittich, E.: 1991, `Pohyb planet po oblohe', in: Astronomicka rocenka 1992,
ed. E. Pittich, SUAA Hurbanovo, Hurbanovo, pp. 90-95.

Porubcan, V., Hajduk, A., Mcintosh, B.A.: 1991, `Visual meteor results from
International Halley Watch', Bull. Astron. Inst. Czechosl. 42, 199-204.

Porubcan, V., Stohl, J.: 1991, `Aktyvnosc i pochodzenie kompleksu meteorowego
Taurydow', in: Dynamika Malych Cial Ukladu Slonecznego, ed. K. Ziolkowski, PAN
Warszawa, Warszawa, pp. 63-70.

Porubcan, V.: 1991, `Leonidy 1969 - rozlozenie castic podla hmotnosti',
Meteoricke spravy 12, 48-50.

Porubcan, V.: 1991, `Meteoricke roje', in: Astronomicka rocenka 1992, ed. E.
Pittich, SUAA Hurbanovo, Hurbanovo, pp. 104-105.

Rusin, V., Minarovjech, M.: 1991, `Short-term Oscillations in Green and Red
Coronal Lines', in: Mechanisms of Chromospheric and Coronal Heating, eds. P.
Ulmschneider, E. R. Priest, R. Rosner, Springer-Verlag, Berlin, pp. 30-32.

Rusin, V., Rybansky, M., Minarovjech, M.: 1991, `Short-term variations in
green and red coronal line intensities', Soln. Dannye 10, 101-101.

Rusin, V.: 1991, `Astronom Milan Rastislav Stefanik', in: Milan Rastislav
Stefanik - vedec, zberatel, politik, Ministerstvo kultury SR, Bratislava, pp.
2-4.

Rusin, V.: 1991, `Detection of Waves or Oscillations in the Emission Corona',
in: 2nd Brazilian PLASMA ASTROPHYSICS WORKSHOP, University of Sao Paulo, Sao
Paulo, pp. SU-03.

Rusin, V.: 1991, `M.R. Stefanik - slovensky astronom', ALFA, Bratislava, 1-120.

Rybansky, M., Rusin, V., Dzifcakova, E.: 1991, `Coronal index of solar
activity Vc [1984-1985]', Contrib. Astron. Obs. Skalnate Pleso 21, 107-203.

Rybansky, M., Rusin, V.: 1991, `Coronal Index in the Years 1988 and 1989',
Sol. dannye 10, 97-98.

Skopal, A., Chochol, D., Vittone, A., Blanco, C., Mammano, A.: 1991,
`Spectroscopic and photometric studies of the symbiotic star EG Andromedae',
Astron. Astrophys. 245, 531-542.

Skopal, A.: 1991, `New ephemeris of the symbiotic eclipsing star AX Per', Inf.
Bull. Variable Stars, 1-4.

Sobelman, I., Zhitnik, I., Valnicek, B., Rybansky, M. ET AL.: 1991,
`Diagnostics of the inner corona by XUV-imaging of the Sun', Adv. Space Res.
11, 99-107.

Stohl, J., Porubcan, V.: 1991, `Meteor showers', Rep. on Astronomy XXIA,
214-217.

Stohl, J., Porubcan, V.: 1991, `O wiarygodnosci kryteriow przynadleznosci
meteorow do roju', in: Dynamika Malych Cial Ukladu Slonecznego, ed. K.
Ziolkowski, PAN Warzsawa, Warzsawa, pp. 43-47.

Svoren, J., Antal, M., Rychtarcik, P., Schalling, P., Cervak, G., Pittich,
E.M., Cisko, T.: 1991, `Precise positions of the minor planets', Minor Planet
Circ., 18171-18172.

Svoren, J., Cisko, T., Petrik, L., Cervak, G., Pittich, E.M., Rychtarcik, P.,
Antal, M., Fabricius, J.: 1991, `Precise positions of the minor planets',
Minor Planet Circ., 17505-17506.

Svoren, J., Pittich, E.M.: 1991, `Observations of minor planets at the
Skalnate Pleso Observatory in the years 1973-1975', Contrib. Astron. Obs.
Skalnate Pleso 21, 293-302.

Svoren, J.: 1991, `Comet observations at the Skalnate Pleso Observatory in the
years 1983-1984', Contrib. Astron. Obs. Skalnate Pleso 21, 51-63.

Svoren, J.: 1991, `Kozmicke vplyvy na vznik a vyvoj zivota', in: Vesmir a
vyvoj, ed. J. Dubnicka, Filozoficky ustav SAV, Bratislava, pp. 158-165.

Svoren, J.: 1991, `Planetky - zlozenie a taxonomicke typy', in: Astronomicka
rocenka 1992, ed. E. Pittich, Obzor, Bratislava, pp. 128-141.

Svoren, J.: 1991, `Post-perihelion photometry of Comet Halley at the Skalnate
Pleso Observatory', Bull. Astron. Inst. Czechosl. 42, 16-21.

Svoren, J.: 1991, `Poznamka k mimoriadnej aktivite Halleyovej komety',
Meteoricke spravy 12, 5-6.

Svoren, J.: 1991, `Program astrometryczny Observatorium astronomicznego na
Skalnatym Plesie', in: Dynamika malych cial ukladu slonecznego, ed. K.
Ziolkowski, Vydavnictvo CBK PAN, Warszawa, pp. 91-95.

Svoren, J.: 1991, `Relation of the secular decrease of brightness to the
orbital elements of short-period comets', Adv. Space Res. 11, 141-148.

Svoren, J.: 1991, `Secular decrease in the brightness of short-period comets',
Contrib. Astron. Obs. Skalnate Pleso 21, 15-49.

Svoren, J.: 1991, `Starnutie kratkoperiodickych komet a vztah rychlosti
starnutia k drahovym elementom', Meteoricke spravy 12, 1-4.

Sykora, J., Letfus, V.: 1991, `The green corona rotation - activity - cycle
connections. Proc. of Workshop "Space and Ground Based Observations of the
Solar Corona"', Solnechnye Dannye, 83-85.

Sykora, J.: 1991, `Low brightness coronal regions - regularities and
responses', Adv. Space Res. 11, 71-74.

Sykora, J.: 1991, `Properties of the white-light corona polarization during
maximum of the solar cycle', in: Solar Polarimetry, ed. L.J. November,
NSO/Sacramento Peak Observatory, Sunspot, NM, pp. 318-325.

Sykora, J.: 1991, `Solar corona, solar wind and geoactivity. Proc. of the
Workshop "Space and Ground Based Observations of the Solar Corona"',
Solnechnye Dannye, 93-94.

Sykora, J.: 1991, `The problem of the summary use of the solar corona
measurements performed at different observatories. Proc. of the Workshop
"Space and Ground Based Observations of the Solar Corona"', Solnechnye Dannye,
98-100.

Urban, Z., Hric, L.: 1991, `UBV Monitoring of 4 Draconis: First year results',
Contrib. Astron. Obs. Skalnate Pleso 20, 121-124.

Viktorinova, B., Antalova, A.: 1991, `LDE Flares in the 21st solar cycle
(1978-1988). 1.Comparison of the Time Occurrences of H-alpha and LDE Flares',
Bull. Astron. Inst. Czechosl. 42, 144-157.

Zboril, M.: 1991, `CHEMICAL ANALYSIS OF THE ATMOSPHERE OF CP3 STAR PI 1
BOO.REVISION OF PREVIOUS ANALYSIS', Bull. Astron. Inst. Czechosl. 42, 215-218.

Zverko, J., Budaj, J., Zboril, M.: 1991, `Spectroscopic study of a mildly
peculiar A-star 68 Ori', Bull. Astron. Inst. Czechosl. 42, 350-354.

Zverko, J., Hric, L., Ziznovsky, J.: 1991, `A Search for rapid variability in
the spectrum of alpha Andromedae by means of photographic spectroscopy',
Contrib. Astron. Obs. Skalnate Pleso 20, 143-149.

Zverko, J., Ziznovsky, J.: 1991, `Photometry an frequency analysis of CP-stars
HR 4330 and HD 192 678', Astrophysical Investigations 6, 86-89.

Zverko, J.: 1991, `Evolucia kozmickych objektov', in: Vesmir a vyvoj, ed. J.
Dubnicka, Filozoficky ustav SAV, Bratislava, pp. 147-157.

Zvolankova, J.: 1991, `Kozmonautika roka 1989', in: Astronomicka rocenka 1992,
ed. E. Pittich, SUAA Hurbanovo, Hurbanovo, pp. 241-258.