@article{1183505540, author = {Bellman, Richard}, title = {Lambert summability of orthogonal series}, journal = {Bull. Amer. Math. Soc.}, volume = {49}, number = {12}, year = {1943}, pages = { 932-934}, language = {en}, url = {http://dml.mathdoc.fr/item/1183505540} }
Bellman, Richard. Lambert summability of orthogonal series. Bull. Amer. Math. Soc., Tome 49 (1943) no. 12, pp. 932-934. http://gdmltest.u-ga.fr/item/1183505540/