@article{BSL_2019_48_1_a0,
     author = {Takano, Mitio},
     title = {A {Modified} {Subformula} {Property} for the {Modal} {Logic} {S4.2}},
     journal = {Bulletin of the Section of Logic},
     publisher = {mathdoc},
     volume = {48},
     number = {1},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BSL_2019_48_1_a0/}
}