O. NIKOLAICHUK, J. MUDRIEVSKAYA, and D. KOLOMIETS, “ASSESSMENT OF THE STATE OF DEVELOPMENT OF THE WORLD MARKET OF HOTEL SERVICES IN THE CONDITIONS OF COVID-19”, Herald of Khmelnytskyi National University. Economic sciences, vol. 294, no. 3, pp. 186–192, Mar. 2021, doi: 10.31891/2307-5740-2021-294-3-29.