@article{MZ_1964__84_170256,
     author = {Wilhelm Stoll},
     title = {Normal families of non-negative divisors.},
     journal = {Mathematische Zeitschrift},
     pages = {154--218},
     year = {1964},
     volume = {84},
     zbl = {0126.09702},
     url = {http://geodesic.mathdoc.fr/item/MZ_1964__84_170256/}
}