%0 Journal Article %A B. P. Paneyakh %T Pseudodifferential operators of constant strength in the main %J Sbornik. Mathematics %D 1967 %P 179-198 %V 2 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1967_2_2_a2/ %G en %F SM_1967_2_2_a2