@article{EJDE_1999__1999__a135,
     author = {Borsuk,  Michail and Portnyagin,  Dmitriy},
     title = {On the {Dirichlet} problem for quasilinear elliptic second order equations with triple degeneracy and singularity in a domain with a boundary conical point},
     journal = {Electronic journal of differential equations},
     year = {1999},
     volume = {1999},
     zbl = {0920.35032},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_1999__1999__a135/}
}