LaRosa, Judith; Bader, Helaine; Garfield, Susan (2009). New Dimensions In Women's Health. Jones & Bartlett Learning. էջ 91. ISBN978-0763765927. Վերցված է 2013 թ․ օգոստոսի 31-ին. «Outercourse is the sharing of sexual intimacy with behaviors such as private part kissing, petting, and mutual masturbation. The advantages of outercourse include no risk of pregnancy without penile-vaginal penetration and the behaviors permit emotional bonding and closeness.»
White, Lois; Duncan, Gena; Baumle, Wendy (2011). Medical Surgical Nursing: An Integrated Approach, 3rd ed. Cengage Learning. էջ 1161. ISBN978-1133707141. Վերցված է 2013 թ․ սեպտեմբերի 1-ին. «Some people consider outercourse to mean sex play without vaginal intercourse, while others consider this to mean sex play with no penetration at all (vaginal, oral, or anal).»
Kahn JO, Walker BD (1998 թ․ հուլիս). «Acute human immunodeficiency virus type 1 infection». The New England Journal of Medicine. 339 (1): 33–9. doi:10.1056/NEJM199807023390107. PMID9647878.
Daar ES, Little S, Pitt J, Santangelo J, Ho P, Harawa N, և այլք: (2001 թ․ հունվար). «Diagnosis of primary HIV-1 infection. Los Angeles County Primary HIV Infection Recruitment Network». Annals of Internal Medicine. 134 (1): 25–9. doi:10.7326/0003-4819-134-1-200101020-00010. PMID11187417. S2CID34714025.
Underhill K, Operario D, Montgomery P (2007 թ․ հոկտեմբեր). Operario D (ed.). «Abstinence-only programs for HIV infection prevention in high-income countries». The Cochrane Database of Systematic Reviews (4): CD005421. doi:10.1002/14651858.CD005421.pub2. PMID17943855.
Kahn JO, Walker BD (1998 թ․ հուլիս). «Acute human immunodeficiency virus type 1 infection». The New England Journal of Medicine. 339 (1): 33–9. doi:10.1056/NEJM199807023390107. PMID9647878.
Daar ES, Little S, Pitt J, Santangelo J, Ho P, Harawa N, և այլք: (2001 թ․ հունվար). «Diagnosis of primary HIV-1 infection. Los Angeles County Primary HIV Infection Recruitment Network». Annals of Internal Medicine. 134 (1): 25–9. doi:10.7326/0003-4819-134-1-200101020-00010. PMID11187417. S2CID34714025.
Underhill K, Operario D, Montgomery P (2007 թ․ հոկտեմբեր). Operario D (ed.). «Abstinence-only programs for HIV infection prevention in high-income countries». The Cochrane Database of Systematic Reviews (4): CD005421. doi:10.1002/14651858.CD005421.pub2. PMID17943855.
Daar ES, Little S, Pitt J, Santangelo J, Ho P, Harawa N, և այլք: (2001 թ․ հունվար). «Diagnosis of primary HIV-1 infection. Los Angeles County Primary HIV Infection Recruitment Network». Annals of Internal Medicine. 134 (1): 25–9. doi:10.7326/0003-4819-134-1-200101020-00010. PMID11187417. S2CID34714025.
Stephey MJ (2008 թ․ դեկտեմբերի 11). «A Brief History of Safe Sex». Time. Վերցված է 2018 թ․ սեպտեմբերի 14-ին. «In the 1540s, an Italian doctor named Gabriele Fallopius — the same man who discovered and subsequently named the Fallopian tubes of the female anatomy — wrote about syphilis, advocating the use of layered linen during intercourse for more "adventurous" (read: promiscuous) men. Legendary lover Casanova wrote about his pitfalls with medieval condoms made of dried sheep gut, referring to them as "dead skins" in his memoir. Even so, condoms made of animal intestine — known as "French letters" in England and la capote anglaise (English riding coats) in France — remained popular for centuries, though always expensive and never easy to obtain, meaning the devices were often reused.»
