A. KORETSKY, IRINA, and SULMAN J. RAHMAT. “FIRST RECORD OF FOSSIL CYSTOPHORINAE (CARNIVORA, PHOCIDAE): MIDDLE MIOCENE SEALS FROM THE NORTHERN PARATETHYS”. RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA 119, no. 3 (November 30, 2013). Accessed February 16, 2025. https://riviste.unimi.it/index.php/RIPS/article/view/6043.