@article{MZM_1988_43_3_a3,
     author = {V. K. Runovskii},
     title = {Real zeros of an even trigonometric polynomial},
     journal = {Matemati\v{c}eskie zametki},
     pages = {334--336},
     publisher = {mathdoc},
     volume = {43},
     number = {3},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1988_43_3_a3/}
}