1. Magnetostratigraphy and the Pliocene-Pleistocene boundary in Italy;Arias;Quat. Res.,1980
2. Pliocene biostratigraphy of DSDP sites 111 and 116 from the North Atlantic Ocean and age of northern hemisphere glaciation;Backman;Stockholm Contrib. Geol.,1979
3. The lower limit of the Pliocene and Pleistocene in the Caribbean and Gulf of Mexico;Beard;Trans. Gulf Coast Assoc. Geol. Soc.,1968
4. Quaternary chronology, paleoclimate, depositional sequences and eustatic cycles;Beard;AAPG Bull.,1982