Ralf Röhrig

DIMENSIONS OF QUALITATIVE SPATIAL REASONING

Christian Freksa, Ralf Röhrig, C. Freksa, 1999 .

A Theory for Qualitative Spatial Reasoning Based on Order Relations

Ralf Röhrig, Ralf Röhrig, 1994, AAAI.

Representation and Processing of Qualitative Orientation Knowledge

Ralf Röhrig, Ralf Röhrig, 1997, KI.

Scene Diagrammatic Medium Relation wanted Mapping Inspecting EDIS

C. Freksa, T. Barkowsky, F. Informatik, 2000 .