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2. American Association of State Highway and Transportation Officials Inc. (AASHTO) (1993). Guide specifications for horizontally curved highway bridges . Washington D.C. 1–111.
3. American Association of State Highway and Transportation Officials Inc. (AASHTO) (1994). LRFD bridge design specifications . Washington D.C.
4. Culver C. G. (1972). “Design recommendations for curved highway bridges.” Final Rep. Proj. 68-32 Pennsylvania Dept. of Transp. Harrisburg Pa. 1–101.