Dulin, Michail V., Dmitriy A. Philippov, and Elena V. Karmazina. 2009. “Current State of Knowledge of the Liverwort and Hornwort Flora of the Vologda Region, Russia”. Folia Cryptogamica Estonica 45 (September):13-22. https://ojs.utlib.ee/index.php/FCE/article/view/13670.