1. Arey, L. B., Developmental Anatomy (Saunders, Philadelphia, 1943).
2. Adelman, H. B., The Embryological Treatises of Hieronymous Fabricius of Aquapendente (Cornell University Press, Ithaca, 1942).
3. Perrault, M., Mem. Acad. R. Soc. Paris, 3(2), 172–205 (1733).
4. Jolly, J., Archs Anat. Microsc., 16, 363–547 (1915).
5. Smith, H. M., and James, L. F., Trans. Kansas Acad. Sci., 61, 86–96 (1958).