NYARADY, Antal, and E. C. VICOL. “About the Ceterach DC.-Species from Romanians Flora”. Notulae Botanicae Horti Agrobotanici Cluj-Napoca 3, no. 1 (August 5, 1967): 65–73. Accessed October 4, 2022. https://www.notulaebotanicae.ro/index.php/nbha/article/view/110.