Volume 33 (2020)

Intra-night flickering of RS Ophiuchi: III. Modes of quasi-periods in the minute scale and their evolution
Ts. B. Georgiev, R. K. Zamanov, S. Boeva, G. Latev, B. Spassov, J. Marti, G. Nikolov, S. Ibryamov, S. V. Tsvetkova,K. A. Stoyanov

Measurement comparison between CCD frames obtained at RNAO and ASV
Zorica Cvetkovic, Rade Pavlovic, Svetlana Boeva, Goran Damljanovic, Miljana D. Jovanovic, Georgi Latev

The origin of impact craters: some ideas
Vladan Celebonovic

Gaia DR2 and Serbian-Bulgarian Investigations
Goran Damljanovic

Quasiperiodicity of some quasars important to ICRF-Gaia CRF link
Miljana D. Jovanovic, Goran Damljanovic

A stochastic sampling method for the analysis of eclipsed pulsations
András Bókon, Imre Barna Bíró

What extent are visual double stars really binaries to?
R. Pavlovic, Z. Cvetkovic, G. Damljanovic, M. D. Jovanović, S. Boeva, G. Latev

Morphology of some quasars suitable for the link between ICRF and future Gaia-CRF
Gabrijela Markovic, Goran Damljanovic

On the extraction of power-law tails of the probability density functions in star-forming cloud
Lyubov Marinkova, Todor Veltchev, Orlin Stanchev, Sava Donkov

Ultra long period Cepheid H42 in M31
N. Taneva, A. Valcheva, G. P. Petrov, P. Nedialkov

Magnetism in Cool Evolved Stars: the M giants EK Bootis and β Pegasi
S. Georgiev, R. Konstantinova-Antova, A. Lebre, M. Auriere, C. Charbonnel, A. Palacios, N. Drake, R. Bogdanovski

On the flux saturation of SOHO/ERNE proton events
Rositsa Miteva, Susan W. Samwel, Svetoslav Zabunov, Momchil Dechev

Disc's parameters and the accretion efficiency of two interacting binary stars: FU Ori and AG Dra
Daniela Boneva

Extended Theories of Gravity and Their Applications to Neutron Stars
Kalin Marinov

Research on the Destabilization and Eruption of Prominences/Filaments in Solar Active Regions
Tsvetan Tsvetkov