@inproceedings{TOOLS-ASIA-1999-CheungCC,
	author        = "Karen S. Cheung and K. O. Chow and T. Y. Cheung",
	booktitle     = "{Proceedings of the 31st International Conference on Technology of Object-Oriented Languages and Systems}",
	doi           = "10.1109/TOOLS.1999.796474",
	isbn          = "0-7695-0393-4",
	pages         = "118--125",
	publisher     = "{IEEE Computer Society}",
	title         = "{Extending Formal Specification To Object-Oriented Models Through Level-View Structured Schemas}",
	year          = 1999,
}