Nesterova Marina S., Mylnikova Lyudmila N., Molodin Vyacheslav I. «The Clay "Rattle" in the Shape of Bear Head and the Variants of Its Usage by the Population of Krotovo Culture (Bronze Age, the end of the 3rd millennium BC, Baraba Forest-Steppe)» // Tomsk State University Journal of History 2017. №49 C.16-22
