@article {Lie00a,
    AUTHOR = {Liesen, J{\"o}rg},
     TITLE = {Computable convergence bounds for {GMRES}},
   JOURNAL = {SIAM J. Matrix Anal. Appl.},
  FJOURNAL = {SIAM Journal on Matrix Analysis and Applications},
    VOLUME = {21},
      YEAR = {2000},
    NUMBER = {3},
     PAGES = {882--903},
}