Clinical Breast and Pelvic Examination Requirements for Hormonal ContraceptionFelicia H. Stewart, James Trussell, Cynthia C. Harper et al.|JAMA|2001Cited by 165
The emergency contraceptive pill: A survey of knowledge and attitudes among students at Princeton UniversityCynthia C. Harper, Charlotte Ellertson|American Journal of Obstetrics and Gynecology|1995Cited by 99
Emergency contraception in Mexico City: what do health care providers and potential users know and think about it?Ana Langer, Charlotte Ellertson, Cynthia C. Harper et al.|Contraception|1999Cited by 62