Skakauskas, Vladas. “Asymptotic Behaviour of a Model of an Age-Sex-Structured Population Dynamics”. Nonlinear Analysis: Modelling and Control 2, no. 1 (December 21, 1998): 97–100. Accessed July 3, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/15291.