D. A.  Bacigalupo, van Hemert, J., Usmani, A., Dillenberger, D. N., Wills, G. B., and Jarvis, S. A., ?Resource management of enterprise cloud systems using layered queuing and historical performance models?, in IEEE International Symposium on Parallel Distributed Processing, 2010, p. 1--8.

D.  Berry, Usmani, A., Torero, J., Tate, A., McLaughlin, S., Potter, S., Trew, A., Baxter, R., Bull, M., and Atkinson, M., ?FireGrid: Integrated emergency response and fire safety engineering for the future built environment?, in All Hands Meeting 2005, Nottingham, UK, 2006.