@article{etna_vol37_pp23-40,
  author  = {J. Cerd\'an and T. Faraj and N. Malla and J. Mar{\'i}n and J. Mas},
  title   = {Block approximate inverse preconditioners for sparse nonsymmetric linear systems},
  journal = {Electron. Trans. Numer. Anal.},
  volume  = {37},
  year    = {2010},
  pages   = {23--40},
}