TY - JOUR AU - N. V. Krupskii TI - Minimal models and the complexity of fragments of the logic of proofs JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 2006 SP - 52 EP - 53 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_2006_1_a9/ LA - ru ID - VMUMM_2006_1_a9 ER -