Andrea V. Burri, Tim D. Spector An Epidemiological Survey of Post-Coital Psychological Symptoms in a UK Population Sample of Female Twins[1]Архивирано на сајту Wayback Machine (7. септембар 2017)| Twin Research and Human Genetics, Volume 14 Number 3 pp. 240–248 Pristupljeno: 7. 9. 2017.
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Andrea V. Burri, Tim D. Spector An Epidemiological Survey of Post-Coital Psychological Symptoms in a UK Population Sample of Female Twins[1]Архивирано на сајту Wayback Machine (7. септембар 2017)| Twin Research and Human Genetics, Volume 14 Number 3 pp. 240–248 Pristupljeno: 7. 9. 2017.