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I. McDougall, F. H. Brown, P. M. Vasconcelos, B. E. Cohen, D. S. Thiede, and M. J. Buchanan. New single crystal 40Ar/39Ar ages improve time scale for deposition of the Omo Group, Omo–Turkana Basin, East Africa. Journal of the Geological Society, London, volume 169, pages 213-226, 2012.

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I. McDougall and F. H. Brown. Precise {40Ar/39Ar} geochronology for the upper Koobi Fora Formation, Turkana Basin, northern Kenya. J. Geol. Soc. London, GeoScienceWorld, volume 163, issue 1, pages 205-220, January 2006.

I. McDougall and C. S. Feibel. Numerical age control for the Miocene-Pliocene succession at Lothagam, a Hominoid-bearing sequence in the Northern Kenya Rift. Lothagam : the dawn of Humanity in eastern Africa, Columbia University Press, pages 43-64, 2003.

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