@article{MAN_1962__147_160957,
     author = {H. ZIESCHANG},
     title = {\"Uber {Worte} .....  ...  in einer freien {Gruppe} mit p freien {Erzeugenden.}},
     journal = {Mathematische Annalen},
     pages = {143--153},
     publisher = {mathdoc},
     volume = {147},
     year = {1962},
     zbl = {0106.02202},
     url = {http://geodesic.mathdoc.fr/item/MAN_1962__147_160957/}
}