@article{BSL_2017_46_1-2_a4,
     author = {Pietruszczak, Andrzej},
     title = {On {Theses} {Without} {Iterated} {Modalities} of {Modal} {Logics} {Between} {C1} and {S5.} {Part} 1},
     journal = {Bulletin of the Section of Logic},
     publisher = {mathdoc},
     volume = {46},
     number = {1-2},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BSL_2017_46_1-2_a4/}
}