Pozdnepoloveckie pogrebenija vsadnikov v Krasnodarskom krae. (Burials of the warriors fighting on horseback of the late Polovtsi period in Krasnodar territory) - Kočkarov, Umar Jusufovič 1977- (Kratkie Soobščenija Instituta Archeologii (Moskva), 217 (2004), 2004)