@article{BSL_2017_46_3-4_a5,
     author = {Mruczek-Nasieniewska, Krystyna and Nasieniewski, Marek},
     title = {Logics with {Impossibility} as the {Negation} and {Regular} {Extensions} of the {Deontic} {Logic} {D2}},
     journal = {Bulletin of the Section of Logic},
     publisher = {mathdoc},
     volume = {46},
     number = {3-4},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BSL_2017_46_3-4_a5/}
}