1. Best of Booch: Designing Strategies for Object Technology;Booch,1996
2. Center for Geometric Modelling home page,1998
3. General Motors sulfate dispersion experiment — an overview of the wind, temperature and concentration fields;Chock;Atmospheric Environment,1977
4. GIS in the process of road design;Čuš-Babič,1998
5. EPS, 1994. Prime Meridian Product Overview. Essential Planning Systems Ltd., Victoria, Canada.