Dulin, M. V., D. A. Philippov, and E. V. Karmazina. “Current State of Knowledge of the Liverwort and Hornwort Flora of the Vologda Region, Russia”. Folia Cryptogamica Estonica, Vol. 45, 1, pp. 13-22, https://ojs.utlib.ee/index.php/FCE/article/view/13670.