%0 Journal Article %A D. N. Babin %T Undecidability of the completeness and {\it A}-completeness problems for some systems of automaton functions %J Diskretnaya Matematika %D 1995 %P 52-65 %V 7 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DM_1995_7_1_a2/ %G ru %F DM_1995_7_1_a2