POWHEG-hvq: Software for heavy quark pair production in hadronic collisions;
            can be interfaced to shower MC programs.

The manual can be found in arXiv:0707.3081v1 [hep-ph].
Please quote the original paper when using this software:

  S.Frixione, P.Nason and G.Ridolfi,
  ``A Positive-Weight Next-to-Leading-Order Monte Carlo for Heavy Flavour
  Hadroproduction,'' arXiv:0707.3088 [hep-ph].


References for the POWHEG method:

  P.Nason, ``A new method for combining NLO QCD
             with shower Monte Carlo algorithms,''
  JHEP {\bf 0411} (2004) 040, [arXiv:hep-ph/0409146].


  P.Nason and G.Ridolfi, ``A positive-weight next-to-leading-order
                           Monte Carlo for Z pair hadroproduction,''
  JHEP {\bf 0608} (2006) 077, [arXiv:hep-ph/0606275].


  S. Frixione, P. Nason, C. Oleari, ``Matching NLO QCD computations
                          with Parton Shower simulations: the POWHEG method''
  JHEP 0711:070,2007, arXiv:0709.2092 [hep-ph]