@article{ETNA_2006__25__a4,
     author = {Khatamov,  Akhtam},
     title = {On the exact estimates of the best spline approximations of functions},
     journal = {Electronic transactions on numerical analysis},
     pages = {446--453},
     year = {2006},
     volume = {25},
     zbl = {1107.41010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2006__25__a4/}
}