@article{MZM_1974_15_1_a0,
     author = {P. V. Galkin},
     title = {The uniqueness of the element of best mean approximation to a continuous function using splines with fixed nodes},
     journal = {Matemati\v{c}eskie zametki},
     pages = {3--14},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_15_1_a0/}
}