Puelinckx, Jean; Aublet, Jean-Louis; Mainguin, Sylvie (2010). "Haut-Poirier (po de) Bloc 1". Index de la Ligne Maginot (in French). fortiff.be. Retrieved 3 June 2010.
Puelinckx, Jean; et al. (2010). "Haut-Poirier (po de) Bloc 2". Index de la Ligne Maginot (in French). fortiff.be. Retrieved 3 June 2010.
Puelinckx, Jean; et al. (2010). "Haut-Poirier (po de) Bloc 3". Index de la Ligne Maginot (in French). fortiff.be. Retrieved 3 June 2010.