1. European prehistory gets even older;Ackerman;Science,1989
2. Villafranchian faunal record of Spain;Aguirre;Quartarpalaontol.,1990
3. Geologia y paleontologia de la cuenca de Guadix-Baza,1989
4. A scheme of Pleistocene chronology for the Tyrrenian side of Central Italy;Ambrosetti;Boll. Soc. Geo. Ital.,1972
5. Patterns of ecological diversity in fossil and modern mammalian communities;Andrews;Biol. J. Linn. Soc.,1979