@article{02112623,
title = {Optimal reconstruction of derivatives on the Sobolev classes.},
journal = {Vladikavkazski\u\i\ Matematicheski\u\i\ Zhurnal},
volume = {5},
year = {2003},
pages = {39-47},
zbl = {1060.41032},
language = {en},
url = {http://dml.mathdoc.fr/item/02112623}
}
Magaril-Il'yaev, G.G.; Osipenko, K.Yu. Optimal reconstruction of derivatives on the Sobolev classes.. Vladikavkazskiĭ Matematicheskiĭ Zhurnal, Tome 5 (2003) pp. 39-47. http://gdmltest.u-ga.fr/item/02112623/