TY - JOUR AU - V. A. Yankov TI - On the extension of the intuitionist propositional calculus to the classical calculus, and the minimal calculus to the intuitionist calculus JO - Izvestiya. Mathematics PY - 1968 SP - 205 EP - 208 VL - 2 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_1968_2_1_a8/ LA - en ID - IM2_1968_2_1_a8 ER -