@article{artinger2010beyond,
  title={Beyond Pinch-to-Zoom: Exploring Alternative Multi-touch Gestures for Map Interaction},
  author={Artinger, Eva and Schanzenbach, Martin and Echtler, Florian and Coskun, Tayfur and Nestler, Simon and Klinker, Gudrun},
  note = {Technische Universit\"at M\"unchen, Report TUM-I-08-19},
  year={2010}
}