"The evolution of the scrotum and testicular descent in mammals: a phylogenetic view". J. Theor. Biol.196 (1): 61–72. January 1999. doi:10.1006/jtbi.1998.0821. பப்மெட்:9892556.
"The evolution of the scrotum and testicular descent in mammals: a phylogenetic view". J. Theor. Biol.196 (1): 61–72. January 1999. doi:10.1006/jtbi.1998.0821. பப்மெட்:9892556.