Herwaarden, J. van. “W. Verbeke, Serta Devota in Memoriam Guillelmi Lourdaux. Pars Prior: Devotio Windeshemensis”. BMGN - Low Countries Historical Review, vol. 110, no. 3, Jan. 1995, pp. 406-7, https://doi.org/10.18352/bmgn-lchr.4070.