@article{MZ_1994__217_1_174704,
     author = {Norbert Jakobowsky},
     title = {Multiple surfaces of non-constant mean curvature.},
     journal = {Mathematische Zeitschrift},
     pages = {497--512},
     year = {1994},
     volume = {217},
     number = {1},
     zbl = {0814.53008},
     url = {http://geodesic.mathdoc.fr/item/MZ_1994__217_1_174704/}
}