Chilvers, C. E., & Smith, S. J. (1994). The effect of patterns of oral contraceptive use on breast cancer risk in young women. The UK National Case-Control Study Group. Nature Publishing Group.

Chilvers, C. E., و S. J. Smith. The Effect of Patterns of Oral Contraceptive Use On Breast Cancer Risk in Young Women. The UK National Case-Control Study Group. Nature Publishing Group, 1994.

Chilvers, C. E., و S. J. Smith. The Effect of Patterns of Oral Contraceptive Use On Breast Cancer Risk in Young Women. The UK National Case-Control Study Group. Nature Publishing Group, 1994.