Laudo Castillo, X., and C. Vilanou Torrano. “The Philosophy of Education in Catalonia in the 20th Century: Dialectics, Synthetics and Vitalists”. Journal of Catalan Intellectual History, no. 6, Sept. 2013, pp. 115-31, https://revistes.iec.cat/index.php/JOCIH/article/view/72886.