%0 Journal Article %A A. S. Makin %T Abel–Poisson means of spectral expansions of the Sturm–Liouville problem %J Differencialʹnye uravneniâ %D 1984 %P 967-980 %V 20 %N 6 %U http://geodesic.mathdoc.fr/item/DE_1984_20_6_a5/ %G ru %F DE_1984_20_6_a5