@article{IM2_1994_43_3_a10,
     author = {A. S. Belov},
     title = {On~an~extremal problem on the minimum of a trigonometric polynomial},
     journal = {Izvestiya. Mathematics},
     pages = {593--606},
     year = {1994},
     volume = {43},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1994_43_3_a10/}
}