@article{UBHD-68958719,
  author={Ellersiek, Timothy},
  title={OpenRouteService},
  subtitle={Nutzungsm{\"o}glichkeiten freier Geodaten f{\"u}r Navigation und Mobilit{\"a}t},
  year={2017},
  pages={24-28},
  language={ger},
  issn={0931-0061},
  volume={31.2016/17},
  journal={HGG-Journal},
}
@article{UBHD-67985606,
  author={Steiger, Enrico and Ellersiek, Timothy and Resch, Bernd and Zipf, Alexander},
  title={Uncovering latent mobility patterns from Twitter during mass events},
  year={2015},
  pages={525-534},
  language={eng},
  issn={2308-1708},
  number={1},
  note={Gesehen am 19.05.2016},
  journal={GI-Forum},
  doi={10.1553/giscience2015s525},
}