@inproceedings{DLT-1997-IkedaA,
	author        = "Daisuke Ikeda and Hiroki Arimura",
	booktitle     = "{Proceedings of the Third International Conference on Developments in Language Theory}",
	pages         = "223--235",
	publisher     = "{Aristotle University of Thessaloniki}",
	title         = "{On the Complexity of Languages Definable by Hereditary Elementary Formal Systems}",
	year          = 1997,
}