P. E. Ratmanov, S. Lotysz, and J. Czajewski, “Polish physicians in Harbin (the first half of the 20th century)”, HOM, vol. 6, no. 1, Feb. 2019, Accessed: Jan. 14, 2026. [Online]. Available: https://historymedjournal.com/index.php/medicine/article/view/236