Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1977_1_a11, author = {R. M. Trigub}, title = {The approximation of functions by polynomials with special coefficients}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {93--99}, publisher = {mathdoc}, number = {1}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1977_1_a11/} }
R. M. Trigub. The approximation of functions by polynomials with special coefficients. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1977), pp. 93-99. http://geodesic.mathdoc.fr/item/IVM_1977_1_a11/