Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MAT_1966_10_6_a5, author = {Y. Katznelson}, title = {Trigonometric series with positive partial sums}, journal = {Matematika}, pages = {155--157}, publisher = {mathdoc}, volume = {10}, number = {6}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1966_10_6_a5/} }
Y. Katznelson. Trigonometric series with positive partial sums. Matematika, Tome 10 (1966) no. 6, pp. 155-157. http://geodesic.mathdoc.fr/item/MAT_1966_10_6_a5/