Stoyanov, Stoyan, Gavril Negrean, and Vladimir Vladimirov. “Contribution to the Knowledge of Bromus Diandrus–Rigidus (Poaceae) Polyploid Complex in the Bulgarian and Romanian Floras”. Proceedings of the Bulgarian Academy of Sciences 75, no. 4 (May 2, 2022): 536–544. Accessed May 24, 2022. http://proceedings.bas.bg/index.php/cr/article/view/63.