Lars Gravesen
- Le Danemark développe l'idée du système ≪ ouvert ≫. In: Bâtiment International / Building Research and Practice, v. 4, n. 1 (Januar 1976). (1976):
- Denmark develops the "open system" concept. In: Bâtiment International / Building Research and Practice, v. 4, n. 1 (Januar 1976). (1976):
- A milestone in tunnelling: Rotterdam's Maas tunnel celebrates its fiftieth anniversary. In: Tunnelling and Underground Space Technology, v. 8, n. 4 (Oktober 1993). (1993):