@article{EJDE_1999__1999__a44,
     author = {Kar\'atson,  J. and Simon,  P.L.},
     title = {Bifurcations for semilinear elliptic equations convex nonlinearity},
     journal = {Electronic journal of differential equations},
     year = {1999},
     volume = {1999},
     zbl = {0933.35058},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_1999__1999__a44/}
}