MAMMAEV, Misrihan Mammaevic. Akademik Khristian Danilovich Fren (1782-1851) o kubachintsakh. History, Archeology and Ethnography of the Caucasus, [S. l.], v. 5, n. 1, p. 122–131, 2009. DOI: 10.32653/CH51122-131. Disponível em: https://caucasushistory.ru/2618-6772/article/view/1084. Acesso em: 10 jun. 2026.