@article{TRSPY_1971_109_a6,
     author = {N. I. Chernykh},
     title = {Approximation of analytic functions by trigonometric polynomials on an interval that is smaller than the period},
     journal = {Informatics and Automation},
     pages = {98--117},
     publisher = {mathdoc},
     volume = {109},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1971_109_a6/}
}