@article{FPM_1995_1_3_a1,
     author = {A. S. Belov},
     title = {New examples of nonnegative trigonometric polynomials with integer coefficients},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {581--612},
     publisher = {mathdoc},
     volume = {1},
     number = {3},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_1995_1_3_a1/}
}