Urbanavichus, Gennadii, and Irina Urbanavichene. “Four Lichen Species New for Russia”. Folia Cryptogamica Estonica 57 (April 28, 2020): 5-8. Accessed September 24, 2020. http://ojs.utlib.ee/index.php/FCE/article/view/fce.2020.57.02.