Czarnota, Paweł, and Martin Kukwa. “Contribution to the Knowledge of Some Poorly Known Lichens in Poland. I. The Genus Absconditella”. Folia Cryptogamica Estonica 440 (September 18, 2017): 1-7. Accessed January 16, 2021. https://ojs.utlib.ee/index.php/FCE/article/view/13701.