@book{BoeckmannNiebsch1998,
  author    = {B{\"o}ckmann, Christine and Niebsch, Jenny},
  title     = {Examination of the nonlinear LIDAR-operator : the influence of inhomogeneous absorbing spheres on operator},
  series = {Preprint NLD},
  volume    = {47},
  journal   = {Preprint NLD},
  publisher = {Univ. Potsdam},
  address   = {Potsdam},
  issn      = {1432-2935},
  pages     = {16 S. : Abb.},
  year      = {1998},
  language  = {en}
}
@book{BoeckmannNiebsch1996,
  author    = {B{\"o}ckmann, Christine and Niebsch, Jenny},
  title     = {A mollifier method for aerosol size},
  series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik},
  volume    = {1996, 07},
  journal   = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik},
  publisher = {Univ.},
  address   = {Potsdam},
  pages     = {[5] Bl.},
  year      = {1996},
  language  = {en}
}