@article{MAN_1976__223_162882,
     author = {Helmut Reckziegel},
     title = {Kr\"ummungsfl\"achen von isometrischen {Immersionen} in {R\"aumen} konstanter {Kr\"ummung.}},
     journal = {Mathematische Annalen},
     pages = {169--182},
     publisher = {mathdoc},
     volume = {223},
     year = {1976},
     zbl = {0319.53042},
     url = {http://geodesic.mathdoc.fr/item/MAN_1976__223_162882/}
}