N. Tregubov, Valerij, Natalia V. Ekkert, and Victor V. Mikhailovsky. “ The History of Residency Training of Healthcare Leaders”. History of Medicine 7, no. 2 (April 30, 2021). Accessed January 21, 2025. https://historymedjournal.com/HOM/index.php/medicine/article/view/285.