@inproceedings{ICALP-1999-GottlobLS,
	author        = "Georg Gottlob and Nicola Leone and Francesco Scarcello",
	booktitle     = "{Proceedings of the 26th International Colloquium on Automata, Languages and Programming}",
	doi           = "10.1007/3-540-48523-6_33",
	isbn          = "3-540-66224-3",
	pages         = "361--371",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Computing LOGCFL Certificates}",
	volume        = 1644,
	year          = 1999,
}