@InProceedings {bs.nspw95,
author = {E. Bertino and P. Samarati},
booktitle = {Proc. of the 1995 ACM SIGSAC New Security Paradigms Workshop},
title = {Research Issues in Authorization Models for Hypertext Systems},
address = {La Jolla, CA},
pages = {22-27},
month = {August},
year = {1995}
}