@article{VMJ_2003_5_1_a5,
     author = {G. G. Magaril-Il'yaev and K. Yu. Osipenko},
     title = {Optimal reconstruction of derivatives on {Sobolev} classes},
     journal = {Vladikavkazskij matemati\v{c}eskij \v{z}urnal},
     pages = {39--47},
     year = {2003},
     volume = {5},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMJ_2003_5_1_a5/}
}