“NEW EARLY BATHONIAN BIGOTITINAE AND ZIGZAGICERATINAE (AMMONOIDEA, MIDDLE JURASSIC)”. RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA 113, no. 3 (November 30, 2007). Accessed July 27, 2026. https://test-ojs-unimi-it.archicoop.it/index.php/RIPS/article/view/5883.