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@article{MZM_1987_41_2_a3, author = {A. S. Belov}, title = {Coefficients of trigonometric series with nonnegative partial sums}, journal = {Matemati\v{c}eskie zametki}, pages = {152--158}, publisher = {mathdoc}, volume = {41}, number = {2}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1987_41_2_a3/} }
A. S. Belov. Coefficients of trigonometric series with nonnegative partial sums. Matematičeskie zametki, Tome 41 (1987) no. 2, pp. 152-158. http://geodesic.mathdoc.fr/item/MZM_1987_41_2_a3/