@article{MZ_1973__130_171850,
     author = {Hans Lausch},
     title = {On {Normal} {Fitting} {Classes.}},
     journal = {Mathematische Zeitschrift},
     pages = {67--72},
     publisher = {mathdoc},
     volume = {130},
     year = {1973},
     zbl = {0238.20039},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__130_171850/}
}