@article{karopoulos2013usage,
author = "Georgios Karopoulos and Paolo Mori and Fabio Martinelli",
journal = "Computers {\&} Security",
note = "Impact Factor 1.430",
pages = "406--418",
publisher = "Elsevier",
title = "{U}sage control in {SIP}-based multimedia delivery",
volume = "39",
year = "2013",
}