Gispert, Hélène. “Mathematical Journals and Teacher Audiences (18th – 20th centuries). The Heuristic Role of the Heterogeneity of Mathematics Education Worlds”. Swiss Journal of Educational Research 40, no. 1 (July 11, 2018): 133-152. Accessed August 6, 2020. https://bop.unibe.ch/sjer/article/view/5056.