Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1993_53_3_a15, author = {V. A. Yudin}, title = {Trigonometric series with positive partial sums}, journal = {Matemati\v{c}eskie zametki}, pages = {149--152}, publisher = {mathdoc}, volume = {53}, number = {3}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1993_53_3_a15/} }
V. A. Yudin. Trigonometric series with positive partial sums. Matematičeskie zametki, Tome 53 (1993) no. 3, pp. 149-152. http://geodesic.mathdoc.fr/item/MZM_1993_53_3_a15/