@article{etna_vol35_pp118-128,
  author  = {Andreas Frommer},
  title   = {Monotone convergence of the Lanczos approximations to matrix functions of Hermitian matrices},
  journal = {Electron. Trans. Numer. Anal.},
  volume  = {35},
  year    = {2009},
  pages   = {118--128},
}