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. ISSN2047-2919. PMID15955884.
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. ISSN2047-2919. PMID15955884.
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. ISSN2047-2919. PMID15955884.
Lehmiller, Justin J. (2017-10-12). The psychology of human sexuality (Secondleid.). Hoboken, NJ. ISBN9781119164708. OCLC992580729.{{cite book}}: CS1 priežiūra: vieta neturi leidėjo (nuoroda)