Tremolada, Fabrizio; Erba, Elisabetta (2002): Morphometric analyses of Aptian Assipetra infracretacea and Rucinolithus terebrodentarius nannoliths; implications for taxonomy, biostratigraphy and paleoceanography. Elsevier, Amsterdam, Netherlands, Marine Micropaleontology, 44 (1-2), 77-92, georefid:2002-040336