Tranchenko, L. V., N. V. Tereshchuk, R. I. Lopatiuk, and O. M. Tranchenko. “Use of Information Support for Marketing in Tourist Enterprises”. Journal of Education, Health and Sport, vol. 11, no. 2, Feb. 2021, pp. 200-7, doi:10.12775/JEHS.2021.11.02.020.