Martin, L., A. Suija, M. Schmeimann, E. Leppik, and J. Pykälä. “New Estonian Records and Amendments: Lichenized and Lichenicolous Fungi”. Folia Cryptogamica Estonica, Vol. 49, Oct. 2012, pp. 93-96, http://ojs.utlib.ee/index.php/FCE/article/view/13621.