@article{MAIS_2007_14_1_a3,
     author = {A. N. Morozov},
     title = {$K$-functionals and best piecewice polynomial approximations},
     journal = {Modelirovanie i analiz informacionnyh sistem},
     pages = {27--30},
     publisher = {mathdoc},
     volume = {14},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAIS_2007_14_1_a3/}
}