P. Halens, Dolen of dwalen. Paul Robin (1837-1912). Pedagoog, anarchist, vrijmetselaar. BMGN - Low Countries Historical Review, [S. l.], v. 116, n. 2, p. 243–244, 2001. DOI: 10.18352/bmgn-lchr.5476. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-106290.. Acesso em: 16 sep. 2024.