@article{SM_2013_204_12_a6,
     author = {R. M. Trigub},
     title = {The exact order of approximation to periodic functions by {Bernstein-Stechkin} polynomials},
     journal = {Sbornik. Mathematics},
     pages = {1819--1838},
     publisher = {mathdoc},
     volume = {204},
     number = {12},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2013_204_12_a6/}
}