%0 Journal Article %A Havrda, Jan %T A study of independence in a set with orthogonality %J Časopis pro pěstování matematiky %D 1987 %P 249-256 %V 112 %N 3 %U http://geodesic.mathdoc.fr/articles/10.21136/CPM.1987.118320/ %R 10.21136/CPM.1987.118320 %G en %F 10_21136_CPM_1987_118320