%0 Journal Article %A Shao, Yanling %A Sun, Liang %A Gao, Yubin %T $\pm$ sign pattern matrices that allow orthogonality %J Czechoslovak Mathematical Journal %D 2006 %P 969-979 %V 56 %N 3 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/CMJ_2006__56_3_a15/ %G en %F CMJ_2006__56_3_a15