%0 Journal Article %A V. N. Krivtsov %T Deductive potentialities of the negationless predicate calculus %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1984 %P 3-5 %N 4 %U http://geodesic.mathdoc.fr/item/VMUMM_1984_4_a0/ %G ru %F VMUMM_1984_4_a0