@article{MM_2004_16_12_a3,
     author = {I. G. Burova and Yu. K. Dem'yanovich},
     title = {On smoothness of splines},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {40--43},
     publisher = {mathdoc},
     volume = {16},
     number = {12},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_2004_16_12_a3/}
}