1. AASHTO. (1994). Manual for condition evaluation of bridges 2nd Ed. Washington D.C.
2. AASHTO. (1998). LRFD bridge design specifications 2nd Ed. Washington D.C.
3. AASHTO. (2002). Standard specifications for highway bridges 17th Ed. Washington D.C.
4. Deflection theory of arches;Asplund S. O.;Trans. Am. Soc. Civ. Eng.,1963
5. Numerical bending analysis of bridges;Austin W. J.;J. Struct. Div.,1982