%0 Journal Article %A V. G. Dolgolaptev %T The rate of convergence of Riesz means of a Fourier series in fundamental systems of functions of the Laplace operator %J Differencialʹnye uravneniâ %D 1986 %P 1824-1826 %V 22 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1986_22_10_a19/ %G ru %F DE_1986_22_10_a19