@Article{Adams-02,
  author =   {Adams, M.~F. and Brezina, M. and Hu, J. J.  and Tuminaro, R. S.},
  title =   {Parallel multigrid smoothing: polynomial versus {G}auss-{S}eidel},
  journal =   {J. Comp. Phys.},
  year =   {2003},
  volume = {188},
  number = {2},
  pages = {593-610}
}