Fernández, Angela Mama. “Pedagogy and Positivism at the Ends of the XIX Century: Pedro Scalabrini, Alfredo Ferreira and the Positive School”. Estudos Ibero-Americanos 29, no. 1 (December 31, 2003): 73–92. Accessed July 17, 2024. https://revistaseletronicas.pucrs.br/index.php/iberoamericana/article/view/24120.