Montagnes O.P., Bernard. «Premiers Combats Du Père Lagrange: Le Congrès De Fribourg (1897)». Archivum Fratrum Praedicatorum 59 (gennaio 1, 1989): 297–369. Consultato maggio 5, 2026. https://heyjoe.fbk.eu/index.php/afp/article/view/8480.