A_G__Cohn
A hierarchical representation of qualitative shape based on connection and convexity
A theory of spatial regions with undetermined boundaries
Calculi for qualitative spatial reasoning
Defining the syntax and the semantics of a visual programming language in a spatial logic
Modal and Non Modal Qualitative Spatial Logics
Qualitative spatial representation and reasoning techniques
Taxonomies of Logically Defined Qualitative Spatial Relations
The `egg-yolk' representation of regions with indeterminate boundaries