@article{Pietsch2015,
  author    = {Pietsch, Wolfram},
  title     = {Augmenting voice of the customer analysis by analysis of belief},
  series = {QFD-Forum},
  journal   = {QFD-Forum},
  number    = {30},
  issn      = {1431-6951},
  pages     = {1 -- 5},
  year      = {2015},
  language  = {en}
}