@inproceedings { 215,
	title = {Modeling Security Requirements Through Ownership, Permission and Delegation.},
	journal = {13th IEEE International Requirements Engineering Conference (RE'05)},
	year = {2005},
	month = {29/08/2005},
	keywords = {pub},
	author = {P. Giorgini and F. Massacci and J. Mylopoulos and N. Zannone}
}