Lazarova, Limonka Koceva, Natasha Stojkovikj, Aleksandra Stojanova, and Marija Miteva. “APPLICATION OF DIFFERENTIAL EQUATIONS IN EPIDEMIOLOGICAL MODELS”. Balkan Journal of Applied Mathematics and Informatics 4, no. 2 (December 23, 2021): 91-102. Accessed May 19, 2022. https://js.ugd.edu.mk/index.php/bjami/article/view/4475.