@article{MAN_1971__193_182726,
     author = {Wolfgang HENKE},
     title = {Riemannsche {Mannigfaltigkeiten} konstanter positiver {Kr\"ummung} in euklidischen {R\"aumen} der {Kodimension} 2.},
     journal = {Mathematische Annalen},
     pages = {265--278},
     publisher = {mathdoc},
     volume = {193},
     year = {1971},
     zbl = {0209.52802},
     url = {http://geodesic.mathdoc.fr/item/MAN_1971__193_182726/}
}