Chumachenko, Tetyana, and Olga Radyvonenko. “Modeling of Hepatitis B Epidemic Process by the Risk Factors Analysis”. Online Journal of Public Health Informatics 6, no. 1 (March 9, 2014). Accessed February 26, 2021. https://ojphi.org/ojs/index.php/ojphi/article/view/5128.