Istomina, Nina B., Olga V. Likhacheva, Irina S. Stepanchikova, Ekaterina S. Kuznetsova, and Dmitry E. Himelbrant. 2018. “New and Rare Lichens and Allied Fungi from the Pskov Region, Russia”. Folia Cryptogamica Estonica 55 (June), 21-31. https://doi.org/10.12697/fce.2018.55.04.