Clinical Psychology Review, 21, 6, 8-2001, pàg. 823–56. DOI: 10.1016/S0272-7358(00)00069-6. PMID: 11497209. «Women rated clitoral stimulation as at least somewhat more important than vaginal stimulation in achieving orgasm; only about 20% indicated that they did not require additional clitoral stimulation during intercourse.»
Obstetrics and Gynecology Clinics of North America, 35, 2, 6-2008, pàg. 169–83, vii. DOI: 10.1016/j.ogc.2008.03.006. PMID: 18486835. «Most women report the inability to achieve orgasm with vaginal intercourse and require direct clitoral stimulation ... About 20% have coital climaxes...»
Eastwick, Paul W.; Eagly, Alice H.; Finkel, Eli J.; Johnson, Sarah E. (en anglès) Journal of Personality and Social Psychology, 101, 5, 2011, pàg. 993–1011. DOI: 10.1037/a0024061. ISSN: 1939-1315. PMID: 21767032.
Lewis, Myrna I. «The History of Female Sexuality in the United States». A: M.D. Women's Sexual Development (en anglès). Springer US, 1980, p. 19–43 (Women in Context). DOI10.1007/978-1-4684-3656-3_2. ISBN 9781468436587.
Clinical Psychology Review, 21, 6, 8-2001, pàg. 823–56. DOI: 10.1016/S0272-7358(00)00069-6. PMID: 11497209. «Women rated clitoral stimulation as at least somewhat more important than vaginal stimulation in achieving orgasm; only about 20% indicated that they did not require additional clitoral stimulation during intercourse.»
Obstetrics and Gynecology Clinics of North America, 35, 2, 6-2008, pàg. 169–83, vii. DOI: 10.1016/j.ogc.2008.03.006. PMID: 18486835. «Most women report the inability to achieve orgasm with vaginal intercourse and require direct clitoral stimulation ... About 20% have coital climaxes...»
Eastwick, Paul W.; Eagly, Alice H.; Finkel, Eli J.; Johnson, Sarah E. (en anglès) Journal of Personality and Social Psychology, 101, 5, 2011, pàg. 993–1011. DOI: 10.1037/a0024061. ISSN: 1939-1315. PMID: 21767032.
Eastwick, Paul W.; Eagly, Alice H.; Finkel, Eli J.; Johnson, Sarah E. (en anglès) Journal of Personality and Social Psychology, 101, 5, 2011, pàg. 993–1011. DOI: 10.1037/a0024061. ISSN: 1939-1315. PMID: 21767032.