%0 Journal Article %A L. Szczepanik %T Quadratic form schemes with non-trivial radical %J Colloquium Mathematicum %D 1984 %P 143-160 %V 49 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-49-2-143-160/ %R 10.4064/cm-49-2-143-160 %G en %F 10_4064_cm_49_2_143_160