@article{etna_vol58_pp597-620,
  author  = {Ming Zhou and Klaus Neymeyr},
  title   = {Convergence rates of individual Ritz values in block preconditioned gradient-type eigensolvers},
  journal = {Electron. Trans. Numer. Anal.},
  volume  = {58},
  year    = {2023},
  pages   = {597--620},
  doi     = {10.1553/etna_vol58s597},
}