TY - JOUR AU - Clarke, Francis H. AU - Rifford, Ludovic AU - Stern, R. J. TI - Feedback in state constrained optimal control JO - ESAIM: Control, Optimisation and Calculus of Variations PY - 2002 SP - 97 EP - 133 VL - 7 PB - EDP-Sciences UR - http://archive.numdam.org/articles/10.1051/cocv:2002005/ DO - 10.1051/cocv:2002005 LA - en ID - COCV_2002__7__97_0 ER -