Fokina, Olga Vasilevna, Ludmila Anatolevna Fufacheva, Raisa Aleksandrovna Shchinova, Oksana Sergeevna Agalakova, and Olga Leonidovna Tetenkina. 2016. “Planning of the Program to Improve the Motivational Policy of the Business Entity in the Service Industry: Factor and Cluster Analysis”. International Review of Management and Marketing 6 (5S):111-17. https://mail.econjournals.com/index.php/irmm/article/view/2734.