Karabushchenko, P. L., A. V. Ponedelkov, S. A. Vorontsov, O. G. Danilyan, and M. V. Vronskaya. 2018. “Elitology of Education and Challenges of the 21st Century”. Amazonia Investiga 7 (17):343-52. https://amazoniainvestiga.info/index.php/amazonia/article/view/740.