Karakhanyan, I.M. and Karakhanyan, M.I. 2023. SUBNORMALITE OF BANACH ALGEBRA. Proceedings of the YSU A: Physical and Mathematical Sciences. 42, 1 (215) (Sep. 2023), 10–17. DOI:https://doi.org/10.46991/PYSU:A/2008.42.1.010.