Neganova, Galina D., and Nina S. Gantsovskaya. “Feliks Yakovlevich Kon: Chronology of the Expedition Beyond the Sayan Mountains”. The New Research of Tuva, no. 4 (November 29, 2019): 216–226. Accessed March 3, 2026. https://nit.tuva.asia/nit/article/view/894.