A. P. Borodovsky, and Yu. V. Oborin. “Artefacts of Violence of the Bronze and Copper Ages in the South of Western Siberia”. Global Journal of Human-Social Science, vol. 21, no. B1, Jan. 2021, pp. 11-25, https://socialscienceresearch.org/index.php/GJHSS/article/view/3555.