The lichens of state protected country estate parks in the Pskov region
...
Бот
.
журн
.
1994.
Т
. 79, №
11.
С
. 29—35.
21.
Santesson R., Moberg R., Nordin A. et al.
Lichen-forming and lichenicolous fungi of Fennoscandia. Uppsala
, 2004.
Istomina N. B., Likhacheyova O. V.
country estate parks, lichens, taxonomic and ecological analyses, analysis of lichen life forms, rare species.
122-129