Martin, Ljudmilla, Ave Suija, Merje Schmeimann, Ede Leppik, and Juha Pykälä. “New Estonian Records and Amendments: Lichenized and Lichenicolous Fungi”. Folia Cryptogamica Estonica 49 (October 1, 2012): 93-96. Accessed October 18, 2019. http://ojs.utlib.ee/index.php/FCE/article/view/13621.