S. F. De Ronde
- Souterrain Grote Marktstraat/Kalvermarkt: A technical masterpiece in the centre of The Hague. In: Tunnelling and Underground Space Technology, v. 14, n. 2 (April 1999). (1999):
- Constructing the Piet Heintunnel and the Wijkertunnel. Vorgetragen bei: Immersed Tunnel Techniques 2, Cork, Ireland, 23-24 April 1997. (1997):