%0 Journal Article %A Helfenstein, H. G. %T A Flat Nonmetrizable Connexion %J Canadian mathematical bulletin %D 1972 %P 205-206 %V 15 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1972-037-2/ %R 10.4153/CMB-1972-037-2 %F 10_4153_CMB_1972_037_2