%0 Journal Article
%A I. L. Bondi
%T Solvability or unsolvability of certain formally-logical calculi
%J Doklady Akademii Nauk
%D 1967
%P 1001-1002
%V 172
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1967_172_5_a1/
%G ru
%F DAN_1967_172_5_a1