%0 Journal Article %A O., Pedersen, K. Barndorff-Nielsen %T Sufficient Data Reduction and Exponential Families. %J Mathematica Scandinavica %D 1968 %P 197-202 %V 22 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1968__22_166043/ %F MS2_1968__22_166043