@misc{Pucher,
  author    = {Pucher, Robert},
  title     = {Usability und Entwicklungskosten},
  subject      = {Usability},
  language  = {de}
}
@misc{Pucher,
  author    = {Pucher, Robert},
  title     = {How to increase Usability and lower development costs},
  subject      = {Usability},
  language  = {en}
}
@misc{Pucher,
  author    = {Pucher, Robert},
  title     = {Mehr Usability zu geringeren Entwicklungskosten},
  subject      = {Usability},
  language  = {de}
}