@article{DAN_1974_216_5_a4,
     author = {M. Ya. Zinger},
     title = {Extremal estimates for the derivatives of a trigonometric polynomial normalized on an interval shorter than a period},
     journal = {Doklady Akademii Nauk},
     pages = {975--978},
     publisher = {mathdoc},
     volume = {216},
     number = {5},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_216_5_a4/}
}