Hà, Huy Khoái. “PROFESSOR LÊ VĂN THIÊM (1918-1991)”. Thang Long Journal of Science: Van hien and Heritage 5, no. 1 (July 14, 2026): 1–10. Accessed August 12, 2026. https://science.thanglong.edu.vn/index.php/volb/article/view/309.