1. Dauner HG, Schibli H, Stucki D. The widening of the Aare bridges at Ruppoldingen, Structural engineering for meeting urban transportation challenges. In16th Congress of the International Association for Bridge and Structural Engineering,2000, Lucerne, Switzerland.
2. Ng PL, Kwan AKH. Structural failure of concrete stitch in bridge widening and its mitigation. InProceedings of International Conference on Structural and Foundation Failures, Wang CM, Murugappan K (eds), IES/StructE Joint Committee, Singapore, 2004; 113–122.
3. ACI Committee 345.Guide for Widening Highway Bridges, Manual of Concrete Practice.American Concrete Institute, Farmington Hills, US: MI, 1998.