1. Gilmore, R. G. Reproductive biology of lamnoid sharks. Env. Biol. Fish. 38, 95–114 (1993).
2. Teshima, K., Kamei, Y., Toda, M. & Uchida, S. Reproductive mode of the tawny nurse shark taken from the Yaeyama Islands, Okinawa, Japan with comments on individuals lacking the second dorsal fin. Bull. Seikai Nati. Fish. Res. Inst. 73, 1–12 (1995).
3. Yano, K. Reproductive biology of the black dogfish, Centroscyllium fabricii, collected from waters off western Greenland. J. Mar. Biol. Ass. UK 75, 285–310 (1995).
4. Hamlett, W. C., Musick, J. A., Eulitt, A. M., Jarrell, R. L. & Kelly, M. A. Ultrastructure of uterine trophonemata, accommodation for uterolactation, and gas exchange in the southern stingray. Dasyatis americana. Can. J. Zool. 74, 1417–1430 (1996).
5. Hamlett, W. C., Kormanik, G., Storrie, M, Stevens, B. & Walker, T. I. In Reproductive Biology and Phylogeny of Chondrichthyes (ed. Hamlett, W. C.). Chondrichthyan parity, lecithotrophy and matrotrophy, 395–434 (CRC Press, Enfield, 2005).