@article{CMUC_1989_30_3_a15,
     author = {Quittner, Pavol},
     title = {On positive solutions of semilinear elliptic problems},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {579--585},
     year = {1989},
     volume = {30},
     number = {3},
     mrnumber = {1031874},
     zbl = {0698.35057},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1989_30_3_a15/}
}