Lutton, B.V. & St George, J. & Murrin, C.R. & Fileti, L.A. & Callard, I.P. (2005)
The elasmobranch ovary. In W.C. Hamlett (Ed.), Reproductive biology and phylogeny of chondrichthyes: sharks, rays and chimaeras, Vol. 3 (pp. 237–281). Science Publishers, Endfield, USA

Callard, I.P. & Fileti, L.A. & Koob, T.J. (1993)
Ovarian steroid synthesis and the hormonal control of the elasmobranch reproductive tract. Environmental Biology of Fishes, 38(1–3), 175–185
DOI: 10.1007/BF00842914