V. N. Tarasova, R. P. Obabko, D. E. Himelbrant, M. A. Boychuk, I. S. Stepanchikova, and E. A. Borovichev, “Diversity and distribution of epiphytic lichens and bryophytes on aspen (Populus tremula) in the middle boreal forests of Republic of Karelia (Russia)”, Folia Cryptog. Estonica, vol. 54, pp. 125–141, Sep. 2017.