@inproceedings{DLT-1993-Istrate,
	author        = "Gabriel Istrate",
	booktitle     = "{Proceedings of the First International Conference on Developments in Language Theory}",
	isbn          = "981-02-1645-9",
	pages         = "81--89",
	publisher     = "{World Scientific}",
	title         = "{The Strong Equivalence of ETOL Grammars}",
	year          = 1993,
}