%0 Journal Article %A A. A. Akimov %T On an axiom of predicate calculus from “Gödel's incompleteness theorems” by R. Smullyan %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1999 %P 60-62 %N 2 %U http://geodesic.mathdoc.fr/item/VMUMM_1999_2_a11/ %G ru %F VMUMM_1999_2_a11