@article{IVM_1971_8_a3,
     author = {M. A. Vorob'eva},
     title = {Approximation of continuous periodic functions by linear means of polynomials of best quadratic deviation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {27--40},
     publisher = {mathdoc},
     number = {8},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1971_8_a3/}
}