@TechReport{vdH:vdf-pre,
  author = 	 {M. Aschenbrenner and Dries, L. van den and
                  Hoeven, J. van der},
  title =        {Maximal immediate extensions of
                  valued differential fields},
  institution =  {ArXiv},
  year =         {2017},
  type =         {Preprint},
  note = 	 {\verb|http://arxiv.org/abs/1701.06691|,
                  accepted for publication in Proc. of the London Math. Soc.}
}

@Article{vdH:vdf,
  author = 	 {M. Aschenbrenner and Dries, L. van den and
                  Hoeven, J. van der},
  title =        {Maximal immediate extensions of
                  valued differential fields},
  journal =      {Proc. of the London Math. Soc.},
  volume =       {117},
  number =       {2},
  year = 	 {2018},
  pages =        {376--406}
}