@incollection{H{\"u}lsmannBorscheidFriedrich2011,
  author    = {H{\"u}lsmann, Marco and Borscheid, Detlef and Friedrich, Christoph M.},
  title     = {General sales forecast models for automobile markets based on time series analysis and data mining techniques},
  series = {Advances in data mining : applications and theoretical aspects},
  publisher = {Springer-Verlag},
  address   = {Berlin},
  pages     = {15},
  year      = {2011},
  language  = {en}
}
@article{H{\"u}lsmannBorscheidFriedrich2012,
  author    = {H{\"u}lsmann, Marco and Borscheid, Detlef and Friedrich, Christoph M.},
  title     = {General sales forecast models for automobile markets and their analysis},
  series = {Transactions on machine learning and data mining},
  volume    = {5 (2012)},
  number    = {2},
  issn      = {1865-6781},
  pages     = {22},
  year      = {2012},
  language  = {en}
}