Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1968_179_4_a3, author = {E. V. Voronovskaya}, title = {The construction of extremal trigonometric polynomials of mixed type}, journal = {Doklady Akademii Nauk}, pages = {768--771}, publisher = {mathdoc}, volume = {179}, number = {4}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_179_4_a3/} }
E. V. Voronovskaya. The construction of extremal trigonometric polynomials of mixed type. Doklady Akademii Nauk, Tome 179 (1968) no. 4, pp. 768-771. http://geodesic.mathdoc.fr/item/DAN_1968_179_4_a3/