@Article{Luthje.2004,
  author = {Christian Lüthje and Cornelius Herstatt},
  title  = {The Lead User Method: an Outline of Empirical Findings and Issues for Future Research},
  journal = {R&D Management},
  year   = {2004},
  number = {5},
  url    = {},

  const  = {\ text}
}