Bronnen, noten en/of referenties Literatuur - A new large mammal from the Ypresian of Morocco: evidence of suprising diversity of early proboscideans. E Gheerbrant et al. Acta Palaeontologica Polonia (2002).
- Gheerbrant, E.; Sudre, J.; Cappetta, H. (1996). "A Palaeocene proboscidean from Morocco". Nature. 383 (6595): 68–71. doi:10.1038/383068a0
- Gheerbrant, Emmanuel; Sudre, Jean; Tassy, Pascal; Amaghzaz, Mbarek; Bouya, Baâdy; Iarochène, Mohamed (2005). "Nouvelles données sur Phosphatherium escuilliei (Mammalia, Proboscidea) de l'Eocene inférieur du Maroc, apports à la phylogeny of the Proboscidea et the ongulés lophodontes". Geodiversitas. 27 (2): 239–333.
- Calandra, I., Göhlich, U.B. & Merceron, G. (2010) Feeding preferences of Gomphotherium subtapiroideum (Proboscidea, Mammalia) from the Miocene of Sandelzhausen (Northern Alpine Foreland Basin, southern Germany) through life and geological time: evidence from dental microwear analysis. Paläontologische Zeitschrift 84: 205. doi:10.1007/s12542-010-0054-0
- Ferretti, Marco; Debruyne, Regis (2010). "Anatomy and Phylogenetic Value of the Mandibular and Coronoid Canals and Their Associated Foramina in Proboscideans (Mammalia)". Zoological Journal of the Linnean Society. 161 (2): 391–413. doi:10.1111/j.1096-3642.2010.00637.
- Gheerbrant, E; Amaghzaz, M; Bouya, B; Goussard, F; Letenneur, C (2014). "Ocepeia (Middle Paleocene of Morocco): the oldest skull of an afrotherian mammal.". PLOS ONE. 9: e89739. doi:10.1371/journal.pone.0089739. PMC 3935939free to read. PMID 24587000
- Larramendi, A. (2016). "Shoulder height, body mass and shape of proboscideans" (PDF). Acta Palaeontologica Polonica. 61. doi:10.4202/app.00136.2014
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