%0 Journal Article %A Cummings, L. J. %A Robinson, R. W. %T Linear Symmetry Classes %J Canadian journal of mathematics %D 1976 %P 1311-1319 %V 28 %N 6 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-130-0/ %R 10.4153/CJM-1976-130-0 %F 10_4153_CJM_1976_130_0