@inproceedings{ICALP-1994-GyssensBG,
	author        = "Marc Gyssens and Jan Van den Bussche and Dirk Van Gucht",
	booktitle     = "{Proceedings of the 21st International Colloquium on Automata, Languages and Programming}",
	doi           = "10.1007/3-540-58201-0_61",
	isbn          = "3-540-58201-0",
	pages         = "106--117",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Expressiveness of Efficient Semi-Deterministic Choice Constructs}",
	volume        = 820,
	year          = 1994,
}