@article{JRAM_1973__258_151278,
     author = {M. Kneser and U. Stuhler and A. Kallmann},
     title = {Invariante {Untermoduln} quadratischer {Moduln.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {51--54},
     publisher = {mathdoc},
     volume = {258},
     year = {1973},
     zbl = {0274.15017},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1973__258_151278/}
}