1. See such sources in the history of embryology: A History of Embryology, 1986 ( Horder, T. J., Witkowski, J. A., and Wylie, C. C., eds.), Cambridge University Press, Cambridge
2. Oppenheimer, J., 1967, Essays in the History of Embryology and Biology, M. I. T. Press, Cambridge and London
3. Churchill, F. B., 1973, Chabry, Roux, and the experimental method in nineteenth century embryology, in Foundations of Scientific Method: The Nineteenth Century ( Giere, R. N. and Westfall, R. S., eds.), Indiana University Press, Bloomington, pp. 161–205.
4. Fischer, J. L., and Smith, J., 1984, French embryology and the “mechanics of development” from 1887 to 1910: L. Chabry, Y. Delage and E. Bataillon, Hist. Philos. Live Scie. 6: 25–39.
5. Fischer, J. L., 1972, Le concept expérimental dans l’oeuvre tératologique d’Etienne Geoffroy Saint-Hilaire, Rev. Hist. Sci. 25: 347–364.