%0 Journal Article %A J. Hoffmann-Jorgensen %T Existence of Conditional Probabilities. %J Mathematica Scandinavica %D 1971 %P 257-264 %V 28 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1971__28_166182/ %F MS2_1971__28_166182