Goni, I. & Cuny, G. (2022)
New record of the genus Ptychodus Agassiz, 1834, (Chondrichthyes, Elasmobranchii) from the Upper Cretaceous of Bornholm (Denmark). Bulletin of the Geological Society of Denmark, 70, 19–25
DOI: 10.37570/bgsd-2022-70-02