%0 Journal Article %A P. G. Naumov %T Undecidability of the Gödel–Löb logic with quantifiers with respect to propositional variables %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1993 %P 13-16 %N 2 %U http://geodesic.mathdoc.fr/item/VMUMM_1993_2_a2/ %G ru %F VMUMM_1993_2_a2