Karadeniz, E., F. S. Beyaz, S. N. Ünlübulduk, and E. Kayhan. “Evaluation of the Impacts of Covid-19 Pandemic on Tourism Sector and the Applied Strategies: A Research on Hotel Managers”. Journal of Turkish Tourism ResearchSEARCH, vol. 4, no. 4, May 2021, pp. 3116-3, https://tutad.org/index.php/tutad/article/view/349.