"Smart City 2020. Emerging Technologies are Poised to Reshape our Urban Environments." Metropolis Magazine (2006).

Mitchell, William. Winged Defense: The Development and Possibilities of Modern Air Power-Economic and Military. Dover Publications, New Edition, 1988.

"The Hydraulic Hypothesis: A Reappraisal." Current Anthropology 14, no. 5 (1973): 532-534.