On the use of Lagrange multiplier in local buckling of side-plated reinforce concrete

AZHARI, M. , HEDAYATI, P., SHAHIDI, A.R.  and BRADFORD, M.A. (2007), "On the use of Lagrange multiplier in local buckling of side-plated reinforce concrete", Structural Engineering and Mechanics, Vol. 26, No. 6, pp. 673-685