TY - JOUR AU - V. L. Velikin TI - Approximation by cubic splines in the classes of continuously differentiable functions JO - Matematičeskie zametki PY - 1972 SP - 215 EP - 226 VL - 11 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1972_11_2_a11/ LA - ru ID - MZM_1972_11_2_a11 ER -