Vinogradova, Marina V., et al. “The Use of MBO (Management of Objectives) Method of Attraction and Evaluation of Effectiveness of Investments to the Tourism and Hospitality”. International Review of Management and Marketing, vol. 6, no. 2S, Feb. 2016, pp. 241-6, https://econjournals.net.tr/index.php/irmm/article/view/2050.