1. Norddalsfjord bridge — present design and evaluation of future possibilities using high strength normal weight and LWA-concrete;Fergestad,1986
2. An evaluation of the economical and technical potential of high strength concrete in long span concrete bridge construction;Fergestad,1987
3. ‘KRAG’ users manual. Version 2.1. Dr Ing. A.Aas-Jakobsen A/S 16.10.91
4. Beton Bogen,1991