TY - JOUR AU - E. G. Lanina TI - Best approximations of functions and approximations by Steklov functions JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 2000 SP - 49 EP - 52 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_2000_2_a12/ LA - ru ID - VMUMM_2000_2_a12 ER -