Pykälä J, Himelbrant DE, Kuznetsova ES, Alexeeva NM. The lichen genera Thelidium and Verrucaria in the Leningrad Region (Russia). Folia Cryptog. Estonica [Internet]. 2012 Oct. 1 [cited 2024 Apr. 26];49:45-57. Available from: https://ojs.utlib.ee/index.php/FCE/article/view/13615