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Barbara L.B.L.FrankowskiBarbara L.B.L., American Academy of Pediatrics Committee onA.A.P.C.AdolescenceAmerican Academy of Pediatrics Committee onA.A.P.C., Sexual orientation and adolescents, „Pediatrics”, 113 (6), 2004, s. 1827–1832, DOI: 10.1542/peds.113.6.1827, ISSN1098-4275, PMID: 15173519 [dostęp 2019-10-26].
Anthony F.A.F.BogaertAnthony F.A.F., The prevalence of male homosexuality: the effect of fraternal birth order and variations in family size, „Journal of Theoretical Biology”, 230 (1), 2004, s. 33–37, DOI: 10.1016/j.jtbi.2004.04.035, ISSN0022-5193, PMID: 15275997 [dostęp 2019-10-26].
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J. MichaelJ.M.BaileyJ. MichaelJ.M. i inni, Sexual Orientation, Controversy, and Science, „Psychological Science in the Public Interest: A Journal of the American Psychological Society”, 17 (2), 2016, s. 45–101, DOI: 10.1177/1529100616637616, ISSN2160-0031, PMID: 27113562 [dostęp 2019-10-26].
Barbara L.B.L.FrankowskiBarbara L.B.L., American Academy of Pediatrics Committee onA.A.P.C.AdolescenceAmerican Academy of Pediatrics Committee onA.A.P.C., Sexual orientation and adolescents, „Pediatrics”, 113 (6), 2004, s. 1827–1832, DOI: 10.1542/peds.113.6.1827, ISSN1098-4275, PMID: 15173519 [dostęp 2019-10-26].
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Anthony F.A.F.BogaertAnthony F.A.F., The prevalence of male homosexuality: the effect of fraternal birth order and variations in family size, „Journal of Theoretical Biology”, 230 (1), 2004, s. 33–37, DOI: 10.1016/j.jtbi.2004.04.035, ISSN0022-5193, PMID: 15275997 [dostęp 2019-10-26].
Susan M.S.M.KeyesSusan M.S.M., Emily F.E.F.RothmanEmily F.E.F., ZiZ.ZhangZiZ., Sexual orientation and sexual behavior: results from the Massachusetts Behavioral Risk Factor Surveillance System, 2002-2006, „Journal of LGBT health research”, 3 (3), 2007, s. 1–10, ISSN1557-4091, PMID: 19042901 [dostęp 2019-10-26].