Lovegrove, B. G. Cool sperm: Why some placental mammals have a scrotum. Journal of Evolutionary Biology. 2014, 27 (5): 801–814. PMID 24735476. doi:10.1111/jeb.12373.
Lovegrove, B. G. Cool sperm: Why some placental mammals have a scrotum. Journal of Evolutionary Biology. 2014, 27 (5): 801–814. PMID 24735476. doi:10.1111/jeb.12373.
web.archive.org
Scrotum. National Institutes of Health. [6 January 2011]. (原始内容存档于2016-07-05).