Anatolievna Kiseleva, Irina, Mikhail Vladimirovich Karmanov, Anatoly Vladimirovich Korotkov, Vladimir Ivanovich Kuznetsov, Mikhail Samuilovich Gasparian, and . . “Risks Management in Travel Business: Peculiarities, Types Criteria of Estimation”. International Journal of Engineering & Technology 7, no. 4.38 (December 3, 2018): 251–254. Accessed April 28, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/24476.