Bol’shunov, A. V., G. V. Sokolova, and A. M. Avdeev. 1. “Prospects for the Use of Traction Devices Friction Type for Drives of Mining, Transport and Technological Machines”. Journal of Mining Institute 209 (1), 9. http://pmi.spmi.ru/index.php/pmi/article/view/5272.