@article{IVM_1969_6_a7,
     author = {M. Ya. Zinger},
     title = {Extremal estimates of the derivatives of a~trigonometric polynomial on an interval shorter than the period},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {62--66},
     publisher = {mathdoc},
     number = {6},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1969_6_a7/}
}