Guy, F.; Mackaye, H.-T.; et al. (2008). "Symphyseal shape variation in extant and fossil hominoids, and the symphysis of Australopithecus bahrelghazali". Journal of Human Evolution. 55 (1): 37–47. doi:10.1016/j.jhevol.2007.12.003. PMID18222528.
Lebetard, A.-E.; Bourlès, D. L.; Braucher, R.; et al. (2010). "Application of the authigenic 10Be/9Be dating method to continental sediments: Reconstruction of the Mio-Pleistocene sedimentary sequence in the early hominid fossiliferous areas of the northern Chad Basin". Earth and Planetary Science Letters. 297 (1–2): 57–70. Bibcode:2010E&PSL.297...57L. doi:10.1016/j.epsl.2010.06.003.
Lebetard, A.-E.; Bourlès, D. L.; Braucher, R.; et al. (2010). "Application of the authigenic 10Be/9Be dating method to continental sediments: Reconstruction of the Mio-Pleistocene sedimentary sequence in the early hominid fossiliferous areas of the northern Chad Basin". Earth and Planetary Science Letters. 297 (1–2): 57–70. Bibcode:2010E&PSL.297...57L. doi:10.1016/j.epsl.2010.06.003.
Guy, F.; Mackaye, H.-T.; et al. (2008). "Symphyseal shape variation in extant and fossil hominoids, and the symphysis of Australopithecus bahrelghazali". Journal of Human Evolution. 55 (1): 37–47. doi:10.1016/j.jhevol.2007.12.003. PMID18222528.