VAPNYARSKAYA, O. I., and T. M. KRIVOSHEEVA. “Improving the Quality of Tourist Services in Central Russia”. Utopía Y Praxis Latinoamericana, Vol. 25, no. 5, Aug. 2020, pp. 317-2, https://mail.produccioncientificaluz.org/index.php/utopia/article/view/33490.