%0 Journal Article %A A. I. Vagabov %T Multiple summability in eigen- and associated functions for nonregular differential bundles %J Doklady Akademii Nauk %D 1980 %P 1300-1303 %V 252 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1980_252_6_a3/ %G ru %F DAN_1980_252_6_a3