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@article{CM_1969__21_1_81_0, author = {Ernst, Dieter}, title = {\"Uber die {Konvergenz} der $(C, 1)${-Mittel} von {Fourier-Laguerre-Reihen}}, journal = {Compositio Mathematica}, pages = {81--101}, publisher = {Wolters-Noordhoff Publishing}, volume = {21}, number = {1}, year = {1969}, mrnumber = {241894}, zbl = {0174.36001}, language = {de}, url = {http://geodesic.mathdoc.fr/item/CM_1969__21_1_81_0/} }
Ernst, Dieter. Über die Konvergenz der $(C, 1)$-Mittel von Fourier-Laguerre-Reihen. Compositio Mathematica, Tome 21 (1969) no. 1, pp. 81-101. http://geodesic.mathdoc.fr/item/CM_1969__21_1_81_0/