%0 Journal Article %A Kofner, Jacob %T Transitivity and Ortho-Bases %J Canadian journal of mathematics %D 1981 %P 1439-1447 %V 33 %N 6 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1981-110-3/ %R 10.4153/CJM-1981-110-3 %F 10_4153_CJM_1981_110_3