@inproceedings{TOOLS-PACIFIC-2000-NguyenZA,
	author        = "Luong T. Nguyen and Liping Zhao and Bill Appelbe",
	booktitle     = "{Proceedings of the 37th International Conference on Technology of Object-Oriented Languages and Systems}",
	doi           = "10.1109/TOOLS.2000.891366",
	pages         = "158--169",
	publisher     = "{IEEE Computer Society}",
	title         = "{A Set Approach to Role Modeling}",
	year          = 2000,
}