1. 1. Tourism data (n.d.). World Tourism Organization. Retrieved from: https://www.unwto.org/tourism-data
2. 2. Bednarska, O.R. & Kulynyak, I.Ya. (2013). Ryzyky u mizhnarodnomu turyzmi: faktory, klasyfikaciya, metody optymizaciyi [Risks in the international tourism: factors, classification, optimization methods]. Visnyk Nacionalnogo universytetu "Lvivska politexnika". Menedzhment ta pidpryyemnycztvo v Ukrayini: etapy stanovlennya i problemy rozvytku. Vol. 767, 3-8 [in Ukrainian].
3. 3. Kravczova, A.V. (2013). Klasyfikaciya ryzykiv pidpryyemstv turystychnogo biznesu [Tourism busi-ness enterprises risk classification]. Visnyk ONU imeni I.I.Mechnykova. Vol. 18, Issue 4 (2), 92-95 [in Ukraini-an].
4. 4. Brych, V. & Kramarchuk, S. (2010). Upravlinnya ryzykamy u turystychnomu biznesi [Risk manage-ment in tourism business]. Naukovi zapysky Ternopilskogo nacionalnogo pedagogichnogo universytetu imeni Volodymyra Gnatyuka. Geografiya. Vol. 2 (28), 105-110. Retrieved from: http://dspace.tnpu.edu.ua/bitstream/123456789/21586/1/Vasil.pdf [in Ukrainian].
5. 5. Bogdan, N.M. & Suxorukova, O.P. (2016). Doslidzhennya ryzykiv u turyzmi [Studying the Risks in Tourism]. Biznes Inform. Vol. 10, 206-211 [in Ukrainian].