@article{MM2_1977__21_154473,
     author = {Karsten Lebelt},
     title = {Freie {Aufl\"osungen} \"ausserer {Potenzen.}},
     journal = {Manuscripta mathematica},
     pages = {341--356},
     publisher = {mathdoc},
     volume = {21},
     year = {1977},
     zbl = {0365.13004},
     url = {http://geodesic.mathdoc.fr/item/MM2_1977__21_154473/}
}