%0 Journal Article %A Poguntke, Detlev %T A Universal Property of the Takahashi Quasi-Dual %J Canadian journal of mathematics %D 1972 %P 530-536 %V 24 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-045-2/ %R 10.4153/CJM-1972-045-2 %F 10_4153_CJM_1972_045_2