W. K. Gregory. The Origin and Evolution of the Human Dentition: A Palæontological Review, Part V. Journal of Dental Research, volume 3, issue 1, pages 87-228, 1921.

W. K. Gregory. The Origin and Evolution of the Human Dentition: A Palaeontological Review, Part I. Journal of Dental Research, volume 2, issue 1, pages 89-183, 1920.