@article{MZM_1974_16_5_a18,
     author = {Yu. N. Subbotin},
     title = {Extremal functional interpolation and approximation by splines},
     journal = {Matemati\v{c}eskie zametki},
     pages = {843--854},
     publisher = {mathdoc},
     volume = {16},
     number = {5},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_16_5_a18/}
}