@article{EJDE_1999__1999__a68,
     author = {Godoy,  T. and Gossez,  J.-P. and Paczka,  S.},
     title = {Antimaximum principle for elliptic problems with weight},
     journal = {Electronic journal of differential equations},
     year = {1999},
     volume = {1999},
     zbl = {0920.35045},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_1999__1999__a68/}
}