@article{DMGAA_2011_31_2_a6,
     author = {Dymek, Grzegorz},
     title = {On two classes of {pseudo-BCI-algebras}},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {217--174},
     publisher = {mathdoc},
     volume = {31},
     number = {2},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2011_31_2_a6/}
}