Per Clausen
- Bridge management system for 10,000 bridges in Thailand. Vorgetragen bei: IABSE Symposium: Durability of Structures = Durabilité des constructions = Dauerhaftigkeit von Bauwerken, Lisbon, Portugal, 6-8 September 1989. (1989):
- The Øresund bridge-tunnel: assessment of the environmental impact. Vorgetragen bei: 14th IABSE Congress, New Delhi, India, 6-10 March 1992. (1992):
- Introduction to bridge management systems. Vorgetragen bei: 14th IABSE Congress, New Delhi, India, 6-10 March 1992. (1992):