Belorybkin, G.N., Gusynin, V.A., Izmaylov, I.L., Vinnichek, V.A. , Gubaidullin, A.M., Ofman, G.Y., Ponomarenko, E.V., Ponomarenko, S.V., Safronov, P.I. and Yankov, V.V. 2020. ARMAMENT OF THE POPULATION OF SOUTH-WESTERN BOLGARIA (10TH - MID-13TH CENTURIES). Arkheologiia Evraziiskikh Stepei (Archaeology of the Eurasian Steppes). 1 (Feb. 2020), 5–306.