Version 0.5: 2010/08/05
  Submission. DF
  o submission
Version 1.0: 2011/03/27
  Report. DF
  o insert the report comments
Version 1.1: 2011/10/26
  Report. DF
  o insert the report comments
Version 1.2: 2011/11/19
  Accepted Version. DF
  o update bibliography and change status
