1.
L'Ordovicien et le Dévonien entre Remouchamps et Spa (carte Louveigné-Spa, 49/3-4) ; The Ordovician and the Devonian between Remouchamps and Spa (Louveigné-Spa map, 49/3-4)
2.
Carte géologique manuscrite de Spa (49/4) à l'échelle de 1:10.000 ; Handwritten geological map of Spa (49/4) at a scale of 1: 10,000
New Linguliformean Brachiopods from the Lower Tremadocian (Ordovician) of The Brabant Massif, Belgium, with comments on contemporaneoux faunas from the Stavelot-Venn Massif