Verkhovskaya, Marina V., Ekaterina V. Men’shikova, and Oleg V. Khazanov. 2016. “Particularities of the Implement of Quality Management System Based on the Requirements of the ISO 9001 in the Telecommunications Companies”. International Review of Management and Marketing 6 (3):603-7. https://mail.econjournals.com/index.php/irmm/article/view/2087.