%0 Journal Article %A P. R. Halmos %T Algebraic and quasialgebraic operators %J Matematika %D 1971 %P 74-83 %V 15 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAT_1971_15_5_a8/ %G ru %F MAT_1971_15_5_a8