Gadziev, M S, et al. “DISCOVERY AND RESEARCH OF THE MUSLIM CULTURAL COMPLEX OF THE X - EARLY XIII CENTURY IN DERBENT (preliminary Report)”. History, Archeology and Ethnography of the Caucasus, vol. 11, no. 3, Sept. 2015, pp. 183-95, https://doi.org/10.32653/CH113183-195.