Fokina, O. V., L. A. Fufacheva, R. A. Shchinova, O. S. Agalakova, and O. L. Tetenkina. “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, vol. 6, no. 5S, Aug. 2016, pp. 111-7,