TY - JOUR AU - D. K. Ugulava TI - Approximation of functions on an $m$-dimensional sphere by Ces\`aro means of Fourier--Laplace series JO - Matematičeskie zametki PY - 1971 SP - 343 EP - 353 VL - 9 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1971_9_3_a12/ LA - ru ID - MZM_1971_9_3_a12 ER -