%0 Journal Article %A Hans Föllmer %A Hélène Airault %T Relative Densities of Semimartingales. %J Inventiones mathematicae %D 1974 %P 299-327 %V 27 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1974__27_142314/ %F IM_1974__27_142314