1. The Protohistoric Pueblo World, A.D. 1275–1600,2004
2. Visions of the Cosmos: ceremonial landscapes and civic plans;Ashmore,2008
3. The spiritual and cultural significance of mountains;Bernbaum,1997
4. Using ARC/GRID to calculate topographic prominence in an archaeological landscape;Christopherson,2003
5. Algorithms for the reduction of the number of points required to represent a digitized line or its caricature;Douglas;Cartographica,1973