TY - JOUR AU - Yazaki, Daishi TI - Semantical Proof of Subformula Property for the Modal Logics K4.3, KD4.3, and S4.3 JO - Bulletin of the Section of Logic PY - 2019 VL - 48 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/BSL_2019_48_4_a3/ LA - en ID - BSL_2019_48_4_a3 ER -