@article{ers07,
   author    = "Howard Elman and Alison Ramage and David Silvester",
   title     = "Algorithm {866}: {IFISS}, a {M}atlab toolbox for modelling
                incompressible flow",
   journal   = "ACM Trans. Math. Softw.",
   volume    = "33",
   pages     = "2--14,",
   year      = "2007"
}


@misc{ifiss,
  author = "David  Silvester and Howard  Elman and Alison Ramage",
  title = "{I}ncompressible {F}low and {I}terative {S}olver {S}oftware ({IFISS})
           version 3.3",
  month ="October",
  year = "2013",
  note = "{\tt http://www.manchester.ac.uk/ifiss/}"
}