@article{BSL_2018_47_4_a3,
     author = {Indrzejczak, Andrzej},
     title = {Rule-Generation {Theorem} and its {Applications}},
     journal = {Bulletin of the Section of Logic},
     publisher = {mathdoc},
     volume = {47},
     number = {4},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BSL_2018_47_4_a3/}
}