PIRONI, T. From Ellen Key to Maria Montessori: planning new educational spaces for childhood. Ricerche di Pedagogia e Didattica. Journal of Theories and Research in Education, [S. l.], v. 5, n. 1, 2010. DOI: 10.6092/issn.1970-2221/1767. Disponível em: https://rpd.unibo.it/article/view/1767. Acesso em: 3 feb. 2023.