Ramovš, Anton. “Two New Petalodont Teeth (Chondrichthyes, Upper Carboniferous) from the Karavanke Mountains, Slovenia”. Geologija 40, no. 1 (December 31, 1997): 109–112. Accessed February 2, 2023. https://www.geologija-revija.si/index.php/geologija/article/view/709.