@inproceedings{DLT-1993-EhrenfeuchtHPR,
	author        = "Andrzej Ehrenfeucht and Hendrik Jan Hoogeboom and Paulien ten Pas and Grzegorz Rozenberg",
	booktitle     = "{Proceedings of the First International Conference on Developments in Language Theory}",
	isbn          = "981-02-1645-9",
	pages         = "357--369",
	publisher     = "{World Scientific}",
	title         = "{An Introduction to Context-free Text Grammars}",
	year          = 1993,
}