Aguirre E, Leakey P 1974: Nakali: Nueva fauna de Hipparion del Rift Valley de Kenya. Estudios Geologicos 30: 219-227.
Agustí J, Cabrera L, Garcès M 2001: Chronology and zoogeography of the Miocene hominoid record in Europe. In de Bonis L, Koufos GD, Andrews P (eds): Phylogeny of the Neogene Hominoid Primates of Eurasia. Cambridge University Press, Cambridge, pp. 2-18.
Agustí J, Köhler M, Moyà-Solà S, Cabrera L, Gargés M, Parés JM 1996: Can Llobateres: The pattern and timing of the Vallesian hominid radiation reconsidered. J Hum Evol 31: 143-155.
Andrews P 1981: Species diversity and diet in monkeys and apes during the Miocene. In Stringer CB (ed): Aspects of Human Evolution. Taylor & Francis Ltd., London, pp 25-61.
Andrews P 1986: Fossil evidence on human origins and dispersal. Cold Spring Harbor Symp Quant Biol 51: 419-428.