ZINCHENKO, I.; TURKA, T. Sing Liveworksheets web service for creating and checking math homework. E-learning teXnology, [S. l.], v. 6, p. 79–85, 2022. DOI: 10.31865/2709-840062022270271. Disponível em: https://journals.uran.ua/texel/article/view/270271. Acesso em: 18 jul. 2024.