@Article {ddls.jcss01,
author = {S. Dawson and S. {De Capitani di Vimercati} and P. Lincoln and P. Samarati},
title = {Maximizing Sharing of Protected Information},
journal = {Journal of Computer and System Sciences (JCSS)},
volume = {64},
number = {3},
pages = {496-541},
month = {May},
year = {2002}
}