%0 Journal Article %A Dobbs, David E. %T On the Global Dimensions of D+M %J Canadian mathematical bulletin %D 1975 %P 657-660 %V 18 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1975-115-3/ %R 10.4153/CMB-1975-115-3 %F 10_4153_CMB_1975_115_3