“LITHOSTRATIGRAPHY AND PLANKTONIC FORAMINIFERAL BIOSTRATIGRAPHY OF THE APTIAN-ALBIAN ‘SCISTI A FUCOIDI’ IN THE PIOBBICO CORE, MARCHE, ITALY: BACKGROUND FOR CYCLOSTRATIGRAPHY”. RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA 95, no. 3 (September 29, 1989). Accessed July 28, 2026. https://test-ojs-unimi-it.archicoop.it/index.php/RIPS/article/view/10625.