%0 Journal Article %A Walsh, John B. %T A property of conformal martingales %J Séminaire de probabilités de Strasbourg %D 1977 %P 490-492 %V 11 %I Springer - Lecture Notes in Mathematics %U http://archive.numdam.org/item/SPS_1977__11__490_0/ %G en %F SPS_1977__11__490_0