“P. Halens, Dolen of Dwalen. Paul Robin (1837-1912). Pedagoog, Anarchist, Vrijmetselaar”. BMGN - Low Countries Historical Review 116, no. 2 (January 1, 2001): 243–244. Accessed November 22, 2024. https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-106290.