@conference{PDP2012,
author = "G. Karopoulos and P. Mori and F. Martinelli",
booktitle = "Proceedings of the 20th Euromicro International Conference on Parallel, Distributed and Network-Based Computing (PDP2012)",
note = "partner: CNR, projects: Nessos, Contrail; tier C; citations 1",
pages = "283-287",
publisher = "IEEE Computer Society",
title = "{C}ontinuous {A}uthorizations in {SIP} with {U}sage {C}ontrol",
year = "2012",
}