@article{EJDE_1997__1997__a12,
     author = {Acker,  Andrew F. and Lancaster,  Kirk E.},
     title = {Qualitative behavior of axial-symmetric solutions of elliptic free boundary problems},
     journal = {Electronic journal of differential equations},
     year = {1997},
     volume = {1997},
     zbl = {0886.35178},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_1997__1997__a12/}
}