KHODOSOVTSEV, ALEXANDER YEVGENOVICH, ANNA OLEKSIIVNA NAUMOVICH, OLGA SERGEEVNA VONDRÁKOVÁ, and JAN VONDRÁK. 2011. “Athelium Imperceptum Nyl. (Thelocarpaceae, Ascomycota), a Scarcely Known Ephemeral Lichen of Biological Soil Crusts, New to Ukraine”. CHORNOMORSKI BOTANICAL JOURNAL 6 (3): 385-89. https://www.cbj.kspu.edu/index.php/cbj/article/view/555.