@article{ReineckeFogliaMehletal.2019,
  author    = {Robert Reinecke and Laura Foglia and Steffen Mehl and Tim Trautmann and Denise C{\´a}ceres and Petra D{\"o}ll},
  title     = {Challenges in developing a global gradient-based groundwater model (G3M v1.0) for the integration into a global hydrological model},
  journal   = {Geoscientific model development},
  volume    = {12},
  number    = {6},
  pages     = {2401 -- 2418},
  doi       = {10.5194/gmd-12-2401-2019},
  year      = {2019},
}