@book{cullum2002lanczos,
  author = {Cullum, J.K. and Willoughby, R.A.},
  interhash = {cfc97672c78c590391fc6f731d48ddc2},
  intrahash = {b6fa6a375178396d472af2006fb21fc8},
  publisher = {Society for Industrial Mathematics},
  title = {{Lanczos algorithms for large symmetric eigenvalue computations: Theory}},
  url = {http://scholar.google.de/scholar.bib?q=info:zshJq2GVHO8J:scholar.google.com/&output=citation&hl=de&ct=citation&cd=0},
  year = 2002
}

@article{fassbender2006structured,
  author = {Fassbender, H. and Kressner, D.},
  interhash = {fdb6be4076647bcdaa17acdd12a1f001},
  intrahash = {1b0138899f66fe7fec4a24ecbcefe9d5},
  journal = {GAMM Mitteilungen},
  number = 2,
  pages = {297--318},
  title = {{Structured eigenvalue problems}},
  url = {http://scholar.google.de/scholar.bib?q=info:cGieYDhejsgJ:scholar.google.com/&output=citation&hl=de&ct=citation&cd=6},
  volume = 29,
  year = 2006
}