Randlane, Tiina, Inga Jüriado, Ave Suija, Piret Lõhmus, and Ede Leppik. 2008. “Lichens in the New Red List of Estonia”. Folia Cryptogamica Estonica 44 (September):113-20. https://ojs.utlib.ee/index.php/FCE/article/view/13713.