Ilyina, I., A. Tsakhaeva, P. Smelov, O. Zaytseva, V. Panfilova, and E. Eshinimaeva-Shagdarova. “Labor Field and Educational Services: Interaction of Two Markets Within Professional Education”. Opción, Vol. 34, June 2019, pp. 1533-46, https://produccioncientifica.luz.edu.ve/index.php/opcion/article/view/24351.