@article{MZ_1989__201_4_174050,
     author = {F. Ehlers and J. Scherk},
     title = {On the {Highest} {Weight} {Deformation} of a {Quasihomogeneous} {Surface} {Singularity.}},
     journal = {Mathematische Zeitschrift},
     pages = {243--248},
     publisher = {mathdoc},
     volume = {201},
     number = {4},
     year = {1989},
     zbl = {0685.32012},
     url = {http://geodesic.mathdoc.fr/item/MZ_1989__201_4_174050/}
}