Vaganova, O., Sirotyk, S., Popkova, A., Smirnova, Z. and Bulaeva, M. (2019) “Additional education in higher professional educational institution”, Amazonia Investiga, 8(22), pp. 305-310. Available at: https://amazoniainvestiga.info/index.php/amazonia/article/view/448 (Accessed: 28April2024).