The FUor Star V2493 Cyg (HBC 722)—Eleven Years at Maximum Brightness

by Evgeni Semkov, Sunay Ibryamov, Stoyanka Peneva
Published 2021-12-01

Multi-Band Intra-Night Optical Variability of BL Lacertae

by Haritma Gaur, Alok C. Gupta, Rumen Bachev, Anton Strigachev, Evgeni Semkov, Paul J. Wiita, Minfeng Gu, Sunay Ibryamov
Published 2017-12-01