1Tice, James T., Erik Steiner, and Allan Ceen. Interactive Nolli Map Website (2005) http://nolli.uoregon.edu
2Tice, James T., Erik Steiner, Dennis Beyer, and Allan Ceen. Giuseppe Vasi's Grand Tour of Rome (2008) http://vasi.uoregon.edu
3White, Richard. Railroaded: The Transcontinentals and the Making of Modern America (New York, 2011).
4Frank, Zephyr. "Layers, Flows and Intersections: Jeronymo José de Mello and Artisan Life in Rio de Janeiro, 1840s-1880s." Journal of Social History (winter 2007): 319.
5Frank, Zephyr and Whitney Berry. "The Slave Market in Rio de Janeiro circa 1869: Context, Movement and Social Experience," Journal of Latin American Geography, 9 (2010): 85-111.
6Giordano, Alberto and Tim Cole. "On Place and Space: Calculating Social and Spatial Networks in the Budapest Ghetto", Transactions in GIS, p. 143, vol. 15(s1), (2011).
7White, Richard. "What is Spatial History," web publication, link, (2010)