1. Cátedra, M. (1991) Through the Door: A View of Space from an Anthropological Perspective, in D. M. Mark and A. U. Frank (eds.), Cognitive and Linguistic Aspects of Geographic Space, Kluwer, Dordrecht
2. Chan, K. K. L. (1988) Evaluating Descriptive Spatial Models for Prescriptive Inference, unpublished doctoral dissertation, Harvard University.
3. Claire, R. W. (1982) ’Algorithm Development for Spatial Operators’, Proceedings, PECORA 9, 213–221.
4. Cox, N. J., Aldred, B. K., and Rhind, D. W. (1980) ’A Relational Data Base System and a Proposal for a Geographical Data Type’, Geo-Processing 1,217–229.
5. Daccy, M. F. (1970) ’Linguistic Aspects of Maps and Geographic Information’, Ontario Geography 5,71–80.