%0 Journal Article %A Balachandran, K. %A Rajagopal, N. %T Optimal control of nonlinear delay systems with implicit derivative and quadratic performance %J Kybernetika %D 1999 %P 225-233 %V 35 %N 2 %U http://geodesic.mathdoc.fr/item/KYB_1999_35_2_a6/ %G en %F KYB_1999_35_2_a6