N. G. Patoliya, and Prof. C. S. Sanghvi. “Comparative Study of Confinement Requirement of Concrete Bridge Pier Using IRC, IS1893: Part-3(draft) and CALTRANs Guidline”. International Journal of Advance Research in Engineering, Science & Technology, vol. 2, no. 11, Nov. 2015, pp. 21-27, https://ijarest.org/index.php/ijarest/article/view/334.