Kemei , Zachariah, Titus Rotich, and Jacob Bitok. “Modelling Population Dynamics Using Age-Structured System of Partial Differential Equations”. International Journal of Applied Mathematical Research 13, no. 2 (October 31, 2024): 110–116. Accessed December 5, 2025. https://www.sciencepubco.com/index.php/ijamr/article/view/32719.