@article{MZ_1982__179_173136,
     author = {Hermann Sohr},
     title = {St\"orungstheoretische {Regularit\"atsuntersuchungen.}},
     journal = {Mathematische Zeitschrift},
     pages = {179--192},
     publisher = {mathdoc},
     volume = {179},
     year = {1982},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1982__179_173136/}
}