TY - JOUR AU - Mawhin, Jean AU - Omana, Walo TI - Two-point boundary value problems for nonlinear perturbations of some singular linear differential equations at resonance JO - Commentationes Mathematicae Universitatis Carolinae PY - 1989 SP - 537 EP - 550 VL - 30 IS - 3 UR - http://geodesic.mathdoc.fr/item/CMUC_1989_30_3_a12/ LA - en ID - CMUC_1989_30_3_a12 ER -