TY - JOUR AU - S. Bahlali TI - Necessary and sufficient conditions of optimality for optimal control problems of forward and backward systems JO - Teoriâ veroâtnostej i ee primeneniâ PY - 2009 SP - 730 EP - 749 VL - 54 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TVP_2009_54_4_a5/ LA - en ID - TVP_2009_54_4_a5 ER -