@article{EJDE_2009__2009__a39,
     author = {Tadie},
     title = {Comparison results for semilinear elliptic equations via {Picone-type} identities},
     journal = {Electronic journal of differential equations},
     year = {2009},
     volume = {2009},
     zbl = {1177.35081},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a39/}
}