P. Bogetoft and L. Otto (2011), Benchmarking with DEA and SFA, R package version 0.20.

Corresponding BibTeX entry:

  @Manual{,
    title = {Benchmarking with DEA and SFA},
    author = {Peter Bogetoft and Lars Otto},
    year = {2011},
    note = {R package version 0.20},
  }