@article{RCM_1999_33_1_a1,
     author = {KLAUS MADLENER and BIRGIT REINERT},
     title = {Non-commutative reduction rings},
     journal = {Revista colombiana de matematicas},
     pages = {27--49},
     year = {1999},
     volume = {33},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/RCM_1999_33_1_a1/}
}