Tzonev, Rossen, Marius Dimitrov, Chavdar Gussev, Vladimir Vulchev, and Ivailo Nikolov. “Classificaton of the Relict Forest Communites of Palla’s Black Pine (Pinus Nigra Subsp. Pallasiana) in Bulgaria”. Hacquetia 17, no. 2 (July 13, 2018). Accessed November 21, 2024. https://ojs.zrc-sazu.si/hacquetia/article/view/6958.