(en) Meave Leakey, Peter S. Ungar, Alan Walker, A new genus of large primate from the Late Oligocene of Lothidok, Turkana District, Kenya, Journal of Human Evolution, volume 28, n°6, 1995, p.519–531, doi:10.1006/jhev.1995.1040, lire en ligne
(en) Alan Walker et al., A new species of Proconsul from the early miocene of Rusinga / Mfangano Islands, Kenya, Journal of Human Evolution, volume 25, n°1, 1993, p.43–56, doi:10.1006/jhev.1993.1037
(en) Meave Leakey, Peter S. Ungar, Alan Walker, A new genus of large primate from the Late Oligocene of Lothidok, Turkana District, Kenya, Journal of Human Evolution, volume 28, n°6, 1995, p.519–531, doi:10.1006/jhev.1995.1040, lire en ligne
dx.doi.org
(en) Hlusko et Ungar, « Alan Cyril Walker. 23 August 1938—20 November 2017 », Biographical Memoirs of Fellows of the Royal Society, vol. 67, , p. 449–467 (DOI10.1098/rsbm.2019.0017)