@article{BernutatBoeckmannRamlau1998,
  author    = {Bernutat, Claudia and B{\"o}ckmann, Christine and Ramlau, Ronny},
  title     = {Examination of the Nonlinear LIDAR-Operator : an Inverse Ill-posed Problem},
  year      = {1998},
  language  = {en}
}
@article{BoeckmannBernutatFischer1998,
  author    = {B{\"o}ckmann, Christine and Bernutat, Claudia and Fischer, Silva},
  title     = {The nonlinear LIDAR-equation : an inverse ill-posed problem},
  year      = {1998},
  language  = {en}
}