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2. Methodological aspects of the study of streams of behavior in elders with dementing illness;Van Haitsma;Alzheimer Disease and Associated Disorders,1997
3. Moving Objects Databases;Güting,2005
4. Lines, blobs, crosses and arrows: diagrammatic communication with schematic figures;Tversky,2000
5. Qualitative spatial representation and reasoning: an overview;Cohn;Fundamenta Informaticae,2001