Gataullina, Svetlana Y., et al. “Development of Marketing Tools in Tourism As a Factor for Cooperation Enhancing Between the Primorye Territory and the Republic of Korea”. International Review of Management and Marketing, vol. 7, no. 1, Jan. 2017, pp. 103-6, https://mail.econjournals.com/index.php/irmm/article/view/3247.