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2. American Association of State Highway and Transportation Officials. Guide specifications for horizontally curved highway bridges. Washington, DC:AASHTO, 1980.
3. American Association of State Highway and Transportation Officials. Guide specifications for horizontally curved highway bridges, 1980: as revised by interim specifications for 1981, 1982, 1984, 1985, 1986. Washington DC: AASHTO, 1987.
4. American Association of State Highway and Transportation Officials. Guide specifications for horizontally curved highway bridges. Washington, DC: AASHTO, 1993.
5. ASCE-AASHTO Task Committee on Curved Girders. Curved I-girder bridge design recommendations. J Struct Div, ASCE 1977;103(ST5):1137–67.