@inproceedings{TOOLS-ASIA-2000-ZhangW,
	author        = "Min Zhang and Kehong Wang",
	booktitle     = "{Proceedings of the 36th International Conference on Technology of Object-Oriented Languages and Systems}",
	doi           = "10.1109/TOOLS.2000.885898",
	isbn          = "0-7695-0875-8",
	pages         = "58--64",
	publisher     = "{IEEE Computer Society}",
	title         = "{Implementing Undo/Redo in PDF Studio Using Object-Oriented Design Pattern}",
	year          = 2000,
}