The authors would like to thank the following people for their help:

  Tarmo Leinonen
  Eugene Demidenko
  Rainer Storn
  Soren Macbeth		
  Hans Werner Borchers
  Enrico Schumann
  Jean-Luc Jannink
  Dirk Eddelbuettel
  Ralf Tautenhahn
  Vinícius Veloso
  Kris Boudt
  Suraj Gupta
  Jeff Allard
  Jonathan Owen 
  Alec Solway
  Tobias Weber
  Alexey Stukalov
  Eliot McIntire
  Jason Thorpe