«THE RUSSIAN PLATFORM AS A KEY REGION FOR VOLGIAN/TITHONIAN CORRELATION: A REVIEW OF THE MEDITERRANEAN FAUNAL ELEMENTS AND AMMONITE BIOSTRATIGRAPHY OF THE VOLGIAN STAGE». Rivista italiana di Paleontologia e Stratigrafia 110, no. 1 (marzo 31, 2004). Consultato luglio 27, 2026. https://test-ojs-unimi-it.archicoop.it/index.php/RIPS/article/view/6305.