%0 Journal Article %A Watanabe, Shinzo %T The existence of a multiple spider martingale in the natural filtration of a certain diffusion in the plane %J Séminaire de probabilités de Strasbourg %D 1999 %P 277-290 %V 33 %I Springer - Lecture Notes in Mathematics %U http://www.numdam.org/item/SPS_1999__33__277_0/ %G en %F SPS_1999__33__277_0