Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1983_34_3_a7, author = {A. Yu. Shadrin}, title = {Monotone approximation of functions by trigonometric polynomials}, journal = {Matemati\v{c}eskie zametki}, pages = {375--386}, publisher = {mathdoc}, volume = {34}, number = {3}, year = {1983}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1983_34_3_a7/} }
A. Yu. Shadrin. Monotone approximation of functions by trigonometric polynomials. Matematičeskie zametki, Tome 34 (1983) no. 3, pp. 375-386. http://geodesic.mathdoc.fr/item/MZM_1983_34_3_a7/