@article{MZ_1971__120_171516,
     author = {Rainer Walden},
     title = {Eindeutigkeitss\"atze f\"ur {II-isometrische} {Eilfl\"achen.}},
     journal = {Mathematische Zeitschrift},
     pages = {143--147},
     publisher = {mathdoc},
     volume = {120},
     year = {1971},
     zbl = {0209.24902},
     url = {http://geodesic.mathdoc.fr/item/MZ_1971__120_171516/}
}