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@article{MZ_1981__178_173109, author = {G\"unter Baigger}, title = {Summability of {Martingales} with {Two-dimensional} {Parameter.}}, journal = {Mathematische Zeitschrift}, pages = {381--386}, publisher = {mathdoc}, volume = {178}, year = {1981}, zbl = {0451.60048}, url = {http://geodesic.mathdoc.fr/item/MZ_1981__178_173109/} }
Günter Baigger. Summability of Martingales with Two-dimensional Parameter.. Mathematische Zeitschrift, Tome 178 (1981), pp. 381-386. http://geodesic.mathdoc.fr/item/MZ_1981__178_173109/