@article{SchoelerSanner1998,
  author    = {Sch{\"o}ler, Klaus and Sanner, Helge},
  title     = {Spatial price discrimination in two-dimensional competitive markets},
  year      = {1998},
  language  = {en}
}
@article{SchoelerSanner1998,
  author    = {Sch{\"o}ler, Klaus and Sanner, Helge},
  title     = {Spatial Price Discrimination in Two-Dimensional Competitive Markets},
  year      = {1998},
  language  = {en}
}