1. Problems with handling spatial data — the voronoi approach
2. Book reviews
3. GOLD, C. M. Dynamic spatial data structures-the Voronoi approach. In Proceedings of the Canadian Conference on GIS. pp.245–255. Ottawa, Canada: Energy, Mines and Resources.
4. JUNGERT, E. Extended symbolic projection used in a knowledge structure for spatial reasoning. In Proceedings of the 4th International Conference on Pattern Recognition. pp.28–30. New York: Springer-Verlag. Cambridge, March