Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1986_39_2_a8, author = {A. V. Reztsov}, title = {Some extremal properties of nonnegative trigonometric polynomials}, journal = {Matemati\v{c}eskie zametki}, pages = {245--252}, publisher = {mathdoc}, volume = {39}, number = {2}, year = {1986}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1986_39_2_a8/} }
A. V. Reztsov. Some extremal properties of nonnegative trigonometric polynomials. Matematičeskie zametki, Tome 39 (1986) no. 2, pp. 245-252. http://geodesic.mathdoc.fr/item/MZM_1986_39_2_a8/