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@article{DAN_1970_191_5_a10, author = {G. I. Ryzhankova}, title = {The oscillation of the sequence of {Fej\'er} sums}, journal = {Doklady Akademii Nauk}, pages = {1001--1003}, publisher = {mathdoc}, volume = {191}, number = {5}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1970_191_5_a10/} }
G. I. Ryzhankova. The oscillation of the sequence of Fej\'er sums. Doklady Akademii Nauk, Tome 191 (1970) no. 5, pp. 1001-1003. http://geodesic.mathdoc.fr/item/DAN_1970_191_5_a10/