@article{ADM_2007_3_a3,
     author = {Ryszard R. Andruszkiewicz and Magdalena Sobolewska},
     title = {Commutative reduced},
     journal = {Algebra and discrete mathematics},
     pages = {18--26},
     year = {2007},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2007_3_a3/}
}