Gmyra, L.B. 2006. Yavlenie dvoeveriya v srede nesvobodnogo naseleniya «strany gunnov» Prikaspiya (VI-VII vv.). History, Archeology and Ethnography of the Caucasus. 2, 1 (Mar. 2006), 3–16. DOI:https://doi.org/10.32653/CH213-16.