1. MacMahon,B., Cole,P., Lin,T.M., Lowe,C.R., Mirra,A.P., Ravnihar,B., Salber,E.J., Valaoras,V.G. and Yuasa,S. (1970) Age at first birth and breast cancer risk. Bull. WHO, 43, 209–221.
2. Moon,R.C. (1969) Relationship between previous reproductive history and chemically induced mammary cancer in rats. Int. J. Cancer, 4, 312–317.
3. Russo,J. and Russo,I.H. (1980) Susceptibility of the mammary gland to carcinogenesis. Am. J. Pathol., 100, 497–512.
4. Russo,J., Tay,L.K. and Russo,I.H. (1982) Differentiation of the mammary gland and susceptibility to carcinogenesis. Breast Cancer Res. Treat., 2, 5–73.
5. Russo,J. and Russo,I.H. (1987) Biological and molecular bases of mammary carcinogenesis. Lab. Invest., 587, 112–137.