@article{MorawetzMaennel2010,
  author    = {K. Morawetz and M. M{\"a}nnel},
  title     = {Impossibility to describe repulsion with contact interaction},
  journal   = {Phys. Lett. A},
  volume    = {374},
  pages     = {644 -- 646},
  year      = {2010},
}