KOLBINA, T.; OLEKSENKO, O. Implementation of Distance Learning in Ukraine. Educational Challenges, Kharkiv, UA, v. 25, n. 1, p. 46–54, 2020. DOI: 10.34142/2709-7986.2020.25.1.04. Disponível em: https://www.educationalchallenges.org.ua/index.php/education_challenges/article/view/38. Acesso em: 7 jun. 2026.