VONDRÁK, JAN, OLGA VONDRÁKOVÁ, and ALEXANDER KHODOSOVTSEV. 2011. “First Record of Fertile Caloplaca Arcisproxima and Designation of Its Epitype”. CHORNOMORSKI BOTANICAL JOURNAL 6 (4): 506-7. https://www.cbj.kspu.edu/index.php/cbj/article/view/539.