Popov, Valery Ivanovich, Lorenzo Capasso, and Natalya Yurievna Naraeva. “Viktor Mikhailovich Zhdanov and the Eradication of Smallpox”. Medicina Historica 6, no. 3 (December 23, 2022): e2022044. Accessed July 18, 2024. https://mattioli1885journals.com/index.php/MedHistor/article/view/13774.