Owen, D. H.; Katz, DF (2005). „A Review of the Physical and Chemical Properties of Human Semen and the Formulation of a Semen Simulant“. Journal of Andrology. 26 (4): 459–69. doi:10.2164/jandrol.04104. PMID15955884.
nih.gov
pubmed.ncbi.nlm.nih.gov
Owen, D. H.; Katz, DF (2005). „A Review of the Physical and Chemical Properties of Human Semen and the Formulation of a Semen Simulant“. Journal of Andrology. 26 (4): 459–69. doi:10.2164/jandrol.04104. PMID15955884.
Lehmiller, Justin J. (12 October 2017). The psychology of human sexuality (Second leid.). Hoboken, NJ. ISBN9781119164708. OCLC992580729.{{cite book}}: CS1 priežiūra: location missing publisher (link)