1. Subsidence and capillary effects in chalk. Proceedings of the Eurock 96, Turin, 1996; 1291-1298.
2. La géologie, de la mer du Nord, Bilan de 15 années d'exploitation pétrolière. Hommage à Léon Calembert, (ed.). Thone: Liége, 1980; 147-181.
3. A constitutive model for partially saturated soils
4. State Surfaces of Partially Saturated Soils: An Effective Pressure Approach
5. Establishment of constitutive laws of chalk and long term tests. Proceedings of the 3rd Sea Chalk Symposium. Copenhagen, June 1990.