Odhiambo, Collins O., and Joram Malului Andrew. “Application of Semi-Markov Process For Model Incremental Change in HIV Staging With Cost Effect”. International Journal of Statistics in Medical Research 11 (October 14, 2022): 97–104. Accessed May 8, 2024. https://lifescienceglobal.com/pms/index.php/ijsmr/article/view/8844.