Vaganova, O. I., Odarich, I. N., Popkova, A. A., Smirnova, Z. V., & Lebedeva, A. A. (2019). Independent work of students in professional educational institutions. Amazonia Investiga, 8(22), 295–304. Retrieved from https://amazoniainvestiga.info/index.php/amazonia/article/view/447