Birger Opgård
- (2022): The new City Bridge of Drammen: A structural insight. Presented at: IABSE Symposium: Challenges for Existing and Oncoming Structures, Prague, Czech Republic, 25-27 May 2022.
- (2022): Stovner Tower Accessible Pedestrian Walkway to the Fiord Viewpoint. Presented at: Footbridge 2022: Creating Experience, Madrid, Spain, 07-09 September 2022.
- Stovner Tower – accessible pedestrian walkway. In: ce/papers, v. 3, n. 3-4 (September 2019). (2019):
- (2014): Chained Floating Bridge. Presented at: IABSE Symposium: Engineering for Progress, Nature and People, Madrid, Spain, 3-5 September 2014.