1. Arnberger, E. (1987): Thematische Kartographie. Höller und Zwick, Braunschweig.
2. Bertin, J. (1983): Semiology of Graphics. University of Wisconsin, Madsin, Wisconsin.
3. Brenner, A. B. (1993): Cartographic Symbolization and Design: ARC/INFO Methods (Doctoral dissertation, Pennsylvania State University.).
4. Brewer, C. A. (1994): Colour use guidelines for mapping and visualization. Visualization in modern cartography, 2, S. 123–148.
5. Burghardt, D.; Purves, R. S.; Edwardes, A. J. (2004): Techniques for on-the-fly generalisation of thematic point data using hierarchical data structures. GIS Research UK 12th Annual Conference.