Conley, Heather A., and Maren Leed. NATO in the Land of Pretend. Center for Strategic and International Studies, 2013.
NATO Team Wins the Locked Shields Cyber Defence Exercise. NATO Cooperative Cyber Defense Centre of Excellence Web Site, 2013.
Martorella, Marco. "
Optimal Sensor Positioning for Inverse Synthetic Aperture Radar."
IEEE Transactions on Aerospace and Electronic Systems 49, no. 1 (2013): 648-658.
Oxford American Dictionary. Oxford: Oxford University Press, 2013.