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@article{MV_1972_24_1_a13, author = {A. R. Sarpe}, title = {On {Euler} means and {T-means} of orthogonal series}, journal = {Matemati\v{c}ki vesnik}, pages = {91 }, publisher = {mathdoc}, volume = {24}, number = {1}, year = {1972}, url = {http://geodesic.mathdoc.fr/item/MV_1972_24_1_a13/} }
A. R. Sarpe. On Euler means and T-means of orthogonal series. Matematički vesnik, Tome 24 (1972) no. 1, p. 91 . http://geodesic.mathdoc.fr/item/MV_1972_24_1_a13/