SAIENKO, Volodymyr et al. Efficiency of Tourism Operators’ and Tourism Agents’ Activities in the Market of Tourist Services of Ukraine. Journal of Environmental Management and Tourism, [S.l.], v. 11, n. 8, p. 1960-1966, jan. 2021. ISSN 2068-7729. Available at: <https://journals.aserspublishing.eu/jemt/article/view/5797>. Date accessed: 04 may 2024.