Voir la notice de l'article provenant de la source Mathematicac Balkanica website
@article{MABA_1992_6_1_a3, author = {T. F. Xie and S. P. Zhou}, title = {A {Problem} on {Approximation} by {Euler} {Means}}, journal = {Mathematica balkanica}, pages = {33}, publisher = {mathdoc}, volume = {6}, number = {1}, year = {1992}, url = {http://geodesic.mathdoc.fr/item/MABA_1992_6_1_a3/} }
T. F. Xie; S. P. Zhou. A Problem on Approximation by Euler Means. Mathematica balkanica, Tome 6 (1992) no. 1, p. 33. http://geodesic.mathdoc.fr/item/MABA_1992_6_1_a3/