@article{MOMA_1983__95_178119,
     author = {H. Hagen},
     title = {Der {Satz} von {Bonnet} f\"ur (k + {1)-Regelfl\"achen.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {197--202},
     publisher = {mathdoc},
     volume = {95},
     year = {1983},
     zbl = {0507.53003},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1983__95_178119/}
}