%0 Journal Article %A Yu. V. Matiyasevich %T Simple examples of unsolvable canonical calculi %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1967 %P 50-88 %V 93 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1967_93_a3/ %G ru %F TM_1967_93_a3