@article{10_4064_aa_33_2_151_168,
     author = {Rolf Berndt and Klaus Schramm},
     title = {Arithmetisch ganze {Differentiale} der {Modulfunktionenk\"orper} 6. und 7. {Stufe}},
     journal = {Acta Arithmetica},
     pages = {151--168},
     publisher = {mathdoc},
     volume = {33},
     number = {2},
     year = {1977},
     doi = {10.4064/aa-33-2-151-168},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-33-2-151-168/}
}