Lukić, D., M. D. Petrović, M. M. Radovanović, T. N. Tretiakova, and J. A. Syromiatnikova. “The Role of TCI and TCCI Indexes in Regional Tourism Planning”. European Journal of Geography, vol. 12, no. 4, Dec. 2021, pp. 006-15, doi:10.48088/ejg.d.luk.12.4.006.015.