@article{CMUC_1989__30_3_a12,
     author = {Mawhin, Jean and Omana, Walo},
     title = {Two-point boundary value problems for nonlinear perturbations of some singular linear differential equations at resonance},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {537--550},
     publisher = {mathdoc},
     volume = {30},
     number = {3},
     year = {1989},
     mrnumber = {1031871},
     zbl = {0686.34014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1989__30_3_a12/}
}