%0 Journal Article %A G. A. Isaev %T Singular multiparameter differential operators. Expansion theorems %J Sbornik. Mathematics %D 1988 %P 53-73 %V 59 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1988_59_1_a3/ %G en %F SM_1988_59_1_a3