1. Heller, C.G. and Nelson, W.O., Recent Progr. Hormone Res., 3: 229, 1948.
2. Rowley, M.J. and Heller, C.G., Fertil. Steril., 17: 177, 1966.
3. Albert, A., Proc. Staff Meeting Mayo Clinic, 30: 552, 1955.
4. Greep, R.O., VanDyke, H.B. and Chow, B.F., Proc. Soc. Exp. Biol. Med., 46: 644, 1941.
5. Heller, C.G., Heller, G.V. and Rowley, M.J., In: Progress in Endocrinology, ed. Gual, C., Excerpta Medica Found., p. 1012, 1969.