%0 Journal Article %A Yan, Jia-An %T A formula for densities of transition functions %J Séminaire de probabilités de Strasbourg %D 1988 %P 92-100 %V 22 %I Springer - Lecture Notes in Mathematics %U http://www.numdam.org/item/SPS_1988__22__92_0/ %G en %F SPS_1988__22__92_0