@article{BSL_2019_48_4_a3,
     author = {Yazaki, Daishi},
     title = {Semantical {Proof} of {Subformula} {Property} for the {Modal} {Logics} {K4.3,} {KD4.3,} and {S4.3}},
     journal = {Bulletin of the Section of Logic},
     publisher = {mathdoc},
     volume = {48},
     number = {4},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BSL_2019_48_4_a3/}
}