@incollection{AST_1996__236__9_0,
     author = {Attal, S. and \'Emery, M.},
     title = {Martingales {d'Az\'ema} bidimensionnelles},
     booktitle = {Hommage \`a P. A. Meyer et J. Neveu},
     series = {Ast\'erisque},
     pages = {9--21},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {236},
     year = {1996},
     mrnumber = {1417972},
     zbl = {0863.60045},
     language = {fr},
     url = {http://archive.numdam.org/item/AST_1996__236__9_0/}
}