@article{SM_1995_186_4_a1,
     author = {A. S. Belov},
     title = {Examples of trigonometric series with non-negative partial sums},
     journal = {Sbornik. Mathematics},
     pages = {485--510},
     publisher = {mathdoc},
     volume = {186},
     number = {4},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_186_4_a1/}
}