@techreport{echtler2007handtrack,
  author      = {Echtler, F. and Huber, M. and Klinker, G.},
  title       = {Hand tracking for enhanced gesture recognition on interactive multi-touch surfaces},
  institution = {Technische Universit{\"a}t M{\"u}nchen, Department of Computer Science},
  month       = nov,
  year        = 2007,
  keywords    = {tabletop interfaces, shadow tracking, multi-touch, FTIR},
	number      = {TUM-I0721}
}