GUSEVA, Liudmila G.; SOLOMONOVICH, Mark. Implementing the zone of proximal development: From the pedagogical experiment to the developmental education system of Leonid Zankov. International Electronic Journal of Elementary Education, [S. l.], v. 9, n. 4, p. 775–786, 2017. Disponível em: https://iejee.com/index.php/IEJEE/article/view/284. Acesso em: 12 feb. 2026.