@article{SPS_1977__11__490_0,
     author = {Walsh, John B.},
     title = {A property of conformal martingales},
     journal = {S\'eminaire de probabilit\'es de Strasbourg},
     pages = {490--492},
     publisher = {Springer - Lecture Notes in Mathematics},
     volume = {11},
     year = {1977},
     mrnumber = {455114},
     zbl = {0364.60078},
     language = {en},
     url = {http://www.numdam.org/item/SPS_1977__11__490_0/}
}