Khaligh, Javad, Aghileh Heydari, Aliakbar Heydari, and Siroos Nazari. “Mathematical Modeling of Infectious Disease and Designing Vaccination Law for Control of This Diseases”. JOURNAL OF ADVANCES IN MATHEMATICS 9, no. 5 (November 15, 2014): 2623–2629. Accessed July 22, 2024. https://rajpub.com/index.php/jam/article/view/2349.