.
Pronin , E. M., V. E. Vasil’ev, and V. Yu. Tsvetkov. 2011. “The Factors Defining the Stability and Sustainable Development of Mineral and Raw Materials Enterprises and the factors’ Influence оn the Activity Results Evaluation”. Journal of Mining Institute 191 (March), 176. https://pmi.spmi.ru/index.php/pmi/article/view/6387.