1. Blackburn DG (1992) Convergent evolution of viviparity, matrotrophy, and specializations for fetal nutrition in reptiles and other vertebrates. Am Zool 32:313–321
2. Blackburn DG (1994) Standardized criteria for the recognition of developmental nutritional patterns in squamate reptiles. Copeia 1994:925–935
3. Blackburn DG (1999) Viviparity and oviparity: evolution and reproductive strategies. In: Knobil TE, Neill JD (eds) Encyclopedia of reproduction. Academic Press, New York, pp 994–1003
4. Blackburn DG (2005a) Evolutionary origins of viviparity in fishes. In: Grier H, Uribe MC (eds) Viviparous fishes. New Life Publications, Homestead, pp 287–301
5. Blackburn DG (2005b) Amniote perspectives on the evolutionary origins of viviparity and placentation. In: Grier H, Uribe MC (eds) Viviparous fishes. New Life Publications, Homestead, pp 301–322