@InProceedings{scivos:nebel:icsc-04,
  author = 	 {Alexander Scivos and Bernhard Nebel},
  title = 	 {The Finest of its Class: The Practical Natural Point-based Ternary Calculus LR for Qualitative Spatial Reasoning},
   
  publisher =   {},
  year =        2004
 keywords =   "spatial cognition, calculus, refinement, LR, flip-flop calculus" 
}