Shvets, I. Y., Y. Y. Shvets, Y. V. Evdokimova, and G. M. Kolpakova. “Territorial Structure of the Tourist Market in the Context of Regional Competitiveness”. Mediterranean Journal of Social Sciences, vol. 6, no. 3 S5, June 2015, p. 267, https://www.richtmann.org/journal/index.php/mjss/article/view/6780.