E. Mansfield, J. Pevehouse, and D. Bearce. Power and the purse : Economic statecraft, interdependence, and national security, Frank Cass, London and Portland, OR, (2000)
M. Kang, J. Park, and J. Froscher. SACMAT '01: Proceedings of the sixth ACM symposium on Access control models and technologies, page 66--74. New York, NY, USA, ACM Press, (2001)
H. Mouratidis, P. Giorgini, and G. Manson. Proceedings of the second international joint conference on Autonomous agents and multiagent systems, (2003)