%0 Journal Article %A Maisonneuve, Bernard %T On Lévy's downcrossing theorem and various extensions %J Séminaire de probabilités de Strasbourg %D 1981 %P 191-205 %V 15 %I Springer - Lecture Notes in Mathematics %U http://archive.numdam.org/item/SPS_1981__15__191_0/ %G en %F SPS_1981__15__191_0