Skobkin, S. S., Y. A. Belavina, and K. G. Vadimovich. “Methodological Approaches to the Formation of the Quality Management System for Hotels in Russian Federation”. International Review of Management and Marketing, vol. 7, no. 1, Jan. 2017, pp. 128-36, https://www.econjournals.com/index.php/irmm/article/view/3377.