Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1968_7_a9, author = {I. N. Pak}, title = {Sums of series in {Chebyshev} polynomials}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {61--69}, publisher = {mathdoc}, number = {7}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1968_7_a9/} }
I. N. Pak. Sums of series in Chebyshev polynomials. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 7 (1968), pp. 61-69. http://geodesic.mathdoc.fr/item/IVM_1968_7_a9/