@inproceedings{ZhangCGLM12,
author = {Wen Zhang and You Chen and Carl A. Gunter and David Liebovitz and Bradley Malin},
title = {Evolving Role Definitions Through Permission Invocation Patterns},
booktitle = {ACM Symposium on Access Control Models and Technologies},
month = {June},
year = {2013},
location = {Newark, NJ},
}