Vaganova OI, Odarich IN, Rudakova OA, Volkova JS, Bulaeva MN. Level differentiation technology in vocational education. Amazonia Investiga [Internet]. 21Apr.2020 [cited 18May2024];9(28):42-9. Available from: https://www.amazoniainvestiga.info/index.php/amazonia/article/view/1279