%0 Journal Article %A V. I. Amstislavskii %T The decomposition of a field of sets that are obtained by an $R$-operation over recursive sets %J Doklady Akademii Nauk %D 1970 %P 743-746 %V 191 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1970_191_4_a0/ %G ru %F DAN_1970_191_4_a0