@article{MZM_2008_83_2_a3,
     author = {G. A. Dzyubenko and M. G. Pleshakov},
     title = {Comonotone {Approximation} of {Periodic} {Functions}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {199--209},
     publisher = {mathdoc},
     volume = {83},
     number = {2},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2008_83_2_a3/}
}