TY - JOUR AU - Quittner, Pavol TI - Singular sets and number of solutions of nonlinear boundary value problems JO - Commentationes Mathematicae Universitatis Carolinae PY - 1983 SP - 371 EP - 385 VL - 24 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMUC_1983__24_2_a15/ LA - en ID - CMUC_1983__24_2_a15 ER -