Stepanchikova, I., M. Andreev, D. Himelbrant, J. Motiejūnaitė, U. Schiefelbein, L. Konoreva, and T. Ahti. “The Lichens of Bolshoy Tuters Island (Tytärsaari), Leningrad Region, Russia”. Folia Cryptogamica Estonica, Vol. 54, Sept. 2017, pp. 95-16, doi:10.12697/fce.2017.54.14.