@inproceedings{Bloch:2010XC,
  author = "Bloch, Jacques  and  Breu, Tobias  and  Frommer, Andreas  and  Heybrock, Simon  and  Schäfer, Katrin  and  Wettig, Tilo",
  title = "{Krylov subspace methods and the sign function: multishifts and deflation in the nonhermitian case}",
  doi = "10.22323/1.091.0043",
  booktitle = "Proceedings of The XXVII International Symposium on Lattice Field Theory {\textemdash} PoS(LAT2009)",
  year = 2010,
  volume = "091",
  pages = "043"
}