Hipparchus Geopositioning Model: an Overview (AUTO-CARTO 8, 1987)
Spatial Data and the Voronoi Tessellation (Dr. Dobb's, 1992)
TileShare: Maps as Computer Images (Dr. Dobb's, 2005)
Ellipsoidal Area Computations of Large Terrestrial Objects (Global Grids, 2000)
A Seamless Global Terrain Model in the Hipparchus System (Global Grids, 2000)
Ellipsoid Radius-Vector as a Near-Conformal Ellipsoid to Sphere Mapping (2008)
From County Boundaries to Satellite Orbits with a Single Geopositioning System (Sorsa 1999)
Pipeline (AHGPP) Database Location Reference System (ASP 1984)
Geologic Information Visualization (R. A. Ambroziak, 1993)
Three Presentations on Geographical Analysis and Modeling (Waldo Tobler, 1993)