GanikhodzhaevN. N., ZhamilovU. U., and Mukhitdinov R. T. “Nonergodic Quadratic Operators for a Two-Sex Population”. Ukrains’kyi Matematychnyi Zhurnal 65, no. 8 (August 25, 2013): 1152–1160. Accessed December 5, 2020. http://umj.imath.kiev.ua/index.php/umj/article/view/2498.