Lykholat, O. A., O. V. Vyshnikina, and D. K. Apalkova. “DIVERSIFICATION OF THE ACTIVITY OF THE HOTEL AND RESTAURANT ENTERPRISE AS A WAY OF INCREASING COMPETITIVENESS”. Systems and Technologies, Vol. 65, no. 1, July 2023, pp. 141-6, doi:10.32782/2521-6643-2023.1-65.17.