CEYNOWA-GIEŁDON, Mirosława and ADAMSKA, Edyta. Notes on the genus Thelidium (Verrucariaceae, lichenized Ascomycota) in the Kujawy region (north-central Poland). Ecological Questions. Online. 20 August 2014. Vol. 19, pp. 25-33. [Accessed 6 May 2024]. DOI 10.12775/EQ.2014.002.