@article{AIHPB_1981__17_3_275_0,
     author = {Ledoux, Michel},
     title = {Classe $L \log L$ et martingales fortes \`a param\`etre bidimensionnel},
     journal = {Annales de l'institut Henri Poincar\'e. Section B. Calcul des probabilit\'es et statistiques},
     pages = {275--280},
     publisher = {Gauthier-Villars},
     volume = {17},
     number = {3},
     year = {1981},
     mrnumber = {631243},
     zbl = {0531.60052},
     language = {fr},
     url = {http://www.numdam.org/item/AIHPB_1981__17_3_275_0/}
}