@conference {KCsGy97,
	title = {Learning syntax and semantics of {ECG} grammars},
	booktitle = {Proceedings of 5th Congress of IAAI},
	year = {1997},
	month = {sep},
	pages = {171},
	author = {G. K{\'o}kai and J. Csirik and Tibor Gyim{\'o}thy}
}
