TY - JOUR AU - Fiacca, Antonella AU - Servadei, Raffaella TI - Extremal solutions for nonlinear neumann problems JO - Discussiones Mathematicae. Differential Inclusions, Control and Optimization PY - 2001 SP - 191 EP - 206 VL - 21 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DMDICO_2001_21_2_a2/ LA - en ID - DMDICO_2001_21_2_a2 ER -