Irina, K., P. Svetlana, P. Nikolay, and R. Alexander. “Value and Price of Russian Business: The Entity, the Relationship and Impact of Financial Indicators”. Journal of Reviews on Global Economics, vol. 7, Nov. 2018, pp. 682-95, https://mail.lifescienceglobal.com/pms/index.php/jrge/article/view/5733.