Mežaka Anna, Brūmelis Guntis, and Piterāns Alfons. 2008. “The Distribution of Epiphytic Bryophyte and Lichen Species in Relation to Phorophyte Characters in Latvian Natural Old-Growth Broad Leaved Forests”. Folia Cryptogamica Estonica 44 (September):89-99. https://ojs.utlib.ee/index.php/FCE/article/view/13711.