Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1971_109_a2, author = {S. B. Stechkin}, title = {The approximation of continuous periodic functions by {Favard} sums}, journal = {Informatics and Automation}, pages = {26--34}, publisher = {mathdoc}, volume = {109}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1971_109_a2/} }
S. B. Stechkin. The approximation of continuous periodic functions by Favard sums. Informatics and Automation, Приближение периодических функций, Tome 109 (1971), pp. 26-34. http://geodesic.mathdoc.fr/item/TRSPY_1971_109_a2/