1. (1987) Placentation in the Viviparous Lined Snake, Tropidoclonion lineatum: Ontogeny of the Extraembryonic Membranes and Histochemistry of Placental Tissues. MSc Thesis, University of Tulsa, Tulsa, Oklahoma.
2. Convergent Evolution of Viviparity, Matrotrophy, and Specializations for Fetal Nutrition in Reptiles and Other Vertebrates
3. (1993) Chorioallantoic placentation in squamate reptiles: Structure, function, development, and evolution. J. Exp. Zool. (in press).