@article{SM_1995_80_2_a6,
     author = {A. A. Zhensykbaev},
     title = {Spline approximation and optimal recovery of operators},
     journal = {Sbornik. Mathematics},
     pages = {393--409},
     year = {1995},
     volume = {80},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_80_2_a6/}
}