Tarasova, V., V. Androsova, A. Sonina, and T. Ahti. “The Lichens from the City of Petrozavodsk in the Herbarium of the Botanical Museum, University of Helsinki”. Folia Cryptogamica Estonica, Vol. 52, Aug. 2015, pp. 41-50, doi:10.12697/fce.2015.52.06.