@article{MZM_1972_11_2_a11,
     author = {V. L. Velikin},
     title = {Approximation by cubic splines in the classes of continuously differentiable functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {215--226},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1972_11_2_a11/}
}