“Modélisation Mathématique de la Population Des Villes”. The Journal of V. N. Karazin Kharkiv National University. Series: International Relations. Economics. Country Studies. Tourism, no. 4 (1144, 2 (November 18, 2015): 97–100. Accessed October 25, 2026. https://periodicals.karazin.ua/irtb/article/view/4512.