@article{MAN_1963__152_161098,
     author = {J. TIPPE},
     title = {Zur isoperimetrischen {Eigenschaft} der {Kugel} in {Riemannschen} {R\"aumen} konstanter positiver {Kr\"ummung.}},
     journal = {Mathematische Annalen},
     pages = {120--148},
     publisher = {mathdoc},
     volume = {152},
     year = {1963},
     zbl = {0131.20204},
     url = {http://geodesic.mathdoc.fr/item/MAN_1963__152_161098/}
}