@techreport{klinker2007sudoku,
  author      = {Klinker, G. and Echtler, F.},
  title       = {3D Visualization and Exploration of Relationships and Constraints at the Example of Sudoku Games},
  institution = {Technische Universit{\"a}t M{\"u}nchen, Department of Computer Science},
  month       = nov,
  year        = 2007,
  keywords    = {visualization, data exploration, augmented reality, markerless tracking},
	number      = {TUM-I0722}
}