Jeffrey M. Bradshaw Niranjan Suri Alberto J. Cañas Robert Davis Kenneth M. Ford Robert R. Hoffman Renia Jeffers Thomas Reichherzer Terraforming Cyberspace. 48-56 2001 34 IEEE Computer 7 http://doi.ieeecomputersociety.org/10.1109/2.933503 db/journals/computer/computer34.html#BradshawSCDFHJR01