@article{1365426,
      note = {"March 1987, Volume 66, Number 363 (first of 2  numbers)"--Cover.},
      author = {Le Bruyn, Lieven,},
      url = {http://library.usi.edu/record/1365426},
      title = {Trace rings of generic 2 by 2 matrices /},
      recid = {1365426},
      pages = {1 online resource (110 pages).},
}