@inproceedings{PEPM-1991-Hansen,
	author        = "Torben Amtoft Hansen",
	booktitle     = "{Proceedings of the First Workshop on Partial Evaluation and Semantics-Based Program Manipulation}",
	doi           = "10.1145/115865.115892",
	isbn          = "0-89791-433-3",
	pages         = "243--254",
	publisher     = "{ACM}",
	title         = "{Properties of Unfolding-based Meta-level Systems}",
	year          = 1991,
}