@article{KurtenbachEickerMayerGuerretal.2012,
  author    = {E. Kurtenbach and A. Eicker and T. Mayer-Guerr and Matthias Holschneider and M. Hayn and M. Fuhrmann and J. Kusche},
  title     = {Improved daily GRACE gravity field solutions using a Kalman smoother},
  journal   = {Journal of geodynamics},
  volume    = {59},
  number    = {3},
  pages     = {39 -- 48},
  doi       = {10.1016/j.jog.2012.02.006},
  year      = {2012},
}