%0 Journal Article %T Optimal control of nonlinear systems using the homotopy perturbation method: Infinite horizon case %A Pouyan Shafaei %A Jajarmi, Amin %A Hamidreza Ramezanpour %A Arman Sargolzaei %J International Journal of Digital Content Technology and its Applications %@ 1975-9339 %D 2010