Lychagina, E.L., and E.N. Mitroshin. 2017. “PRELIMINARY RESULTS OF THE STUDY OF THE MESILITHIC SITES LOCATED ON THE EASTERN SHORE OF LAKE CHASHKINSKOE”. Perm Federal Research Centre Journal, no. 3 (January): 92-99. https://journal.permsc.ru/index.php/pscj/article/view/PSCJ2016n3p12.