Aleksandrovna Sizeneva, Lidiya, Aleksandr Vasilievich Dyachenko, and Tatyana Leonidovna Kosulnikova. “The Metatheoretical Study of the Tourism System of the Volgograd Region and the Study of Preferences of Consumers of Regional Tourism Products”. International Journal of Engineering & Technology 7, no. 4.38 (December 3, 2018): 502–514. Accessed November 24, 2024. https://sciencepubco.com/index.php/ijet/article/view/24612.