%0 Journal Article %A Zafer Nurlu %T $S_{g}$ spaces and the vanishing of the functor Ext %J Studia Mathematica %D 1988 %P 13-21 %V 88 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-88-1-13-21/ %R 10.4064/sm-88-1-13-21 %G en %F 10_4064_sm_88_1_13_21