Middle jurassic to lower cretaceous radiolaria of tethys : occurrences, systematics, biochronology - Baumgartner, Peter O.; O'Dogherty, Luis; Gorican, Spela; Urquhart, Elspeth; Pillevuit, Alain (1995)
Keywords: PALEONTOLOGIA -- JURASICO; ESTRATIGRAFIA -- CRETACICO