Czarnota, Paweł, and Martin Kukwa. 2017. “Contribution to the Knowledge of Some Poorly Known Lichens in Poland. III. Trapelia Corticola and the Genus Vezdaea”. Folia Cryptogamica Estonica 46 (September):25-31. https://ojs.utlib.ee/index.php/FCE/article/view/13660.