Velev, N., Apostolova, I., Rozbrojová, Z., & Hájková, P. (2015). The alliances Arrhenatherion, Cynosurion and Trifolion medii in western Bulgaria – environmental gradients and ecological limitations. Hacquetia, 9(2). Retrieved from https://ojs.zrc-sazu.si/hacquetia/article/view/2894