@article{MZ_1968__108_171095,
     author = {Rudolf Wille},
     title = {Primitive {L\"ange} und primitive {Weite} bei modularen {Verb\"anden.}},
     journal = {Mathematische Zeitschrift},
     pages = {129--136},
     publisher = {mathdoc},
     volume = {108},
     year = {1968},
     zbl = {0169.32403},
     url = {http://geodesic.mathdoc.fr/item/MZ_1968__108_171095/}
}