Kolodij, N. A., T. V. Konyukhova, V. V. Kolodij, D. K. Birjukov, and L. B. Filandysheva. “Lifelong Education System in Russian Tourism and Hospitality: Models, Technologies, Context”. New Trends and Issues Proceedings on Humanities and Social Sciences, vol. 3, no. 1, Mar. 2021, pp. 26-33, doi:10.18844/prosoc.v3i1.1726.