Grzimek, B. (1974). Grzimek's Animal Life Encyclopedia: Volume 5 Fishes II & Amphibians.. New York: Van Nostrand Reihnhold Co.. str. 301–302. ASINB000HHFY52.
Patrick R. Murray, Ken S. Rosenthal, Michael A. Pfaller, (2013). Medical microbiology (7th ed. izd.). St. Louis, Mo.: Mosby. str. 418. ISBN9780323086929.
Therese Jones, Delese Wear, Lester D. Friedman (2014). Health Humanities Reader. Rutgers University Press. str. 231–232. ISBN081357367X. Pristupljeno November 29, 2014.
STD's TodayArhivirano 2014-10-25 na Wayback Machine-u National Prevention Network, Center for Disease Control, United States Government, retrieving 2007
doi.org
dx.doi.org
Cantino, Philip D.; James A. Doyle, Sean W. Graham, Walter S. Judd, Richard G. Olmstead, Douglas E. Soltis, Pamela S. Soltis, & Michael J. Donoghue (2007). „Towards a phylogenetic nomenclature of Tracheophyta”. Taxon56 (3): E1–E44. DOI:10.2307/25065865. ISSN0040-0262.
Werdelin L, Nilsonne A (January 1999). „The evolution of the scrotum and testicular descent in mammals: a phylogenetic view”. J. Theor. Biol.196 (1): 61–72. DOI:10.1006/jtbi.1998.0821. PMID9892556.
Rodger, JC; Hughes, RL (1973). „Studies of the accessory glands of male marsupials”. Australian Journal of Zoology21 (3): 303. DOI:10.1071/ZO9730303.
Sharman, G. B.; Pilton, Phyllis E. (1964). „The life history and reproduction of the red kangaroo (Megaleia rufa)”. Proceedings of the Zoological Society of London142 (1): 29–48. DOI:10.1111/j.1469-7998.1964.tb05152.x.
Sadleir, R. M. F. S. (1965). „Reproduction in two species of kangaroo (Macropus robustus and Megaleia rufa in the arid Pilbara region of Western Australia”. Proceedings of the Zoological Society of London145 (2): 239–261. DOI:10.1111/j.1469-7998.1965.tb02016.x.
Werdelin L, Nilsonne A (January 1999). „The evolution of the scrotum and testicular descent in mammals: a phylogenetic view”. J. Theor. Biol.196 (1): 61–72. DOI:10.1006/jtbi.1998.0821. PMID9892556.
STD's TodayArhivirano 2014-10-25 na Wayback Machine-u National Prevention Network, Center for Disease Control, United States Government, retrieving 2007
Cantino, Philip D.; James A. Doyle, Sean W. Graham, Walter S. Judd, Richard G. Olmstead, Douglas E. Soltis, Pamela S. Soltis, & Michael J. Donoghue (2007). „Towards a phylogenetic nomenclature of Tracheophyta”. Taxon56 (3): E1–E44. DOI:10.2307/25065865. ISSN0040-0262.