V. Kuzmina, Iuliia, and Nataliya P. Shok. “Richard Fronschtein: Unknown Facts of Biography. Student Years (1900–1907)”. History of Medicine 4, no. 2 (April 30, 2017). Accessed September 27, 2024. https://historymedjournal.com/HOM/index.php/medicine/article/view/170.