@inproceedings{LICS-2004-IntrigilaS,
	author        = "Benedetto Intrigila and Richard Statman",
	booktitle     = "{Proceedings of the 19th IEEE Symposium on Logic in Computer Science}",
	doi           = "10.1109/LICS.2004.1319614",
	isbn          = "0-7695-2192-4",
	pages         = "202--210",
	publisher     = "{IEEE Computer Society}",
	title         = "{The ω-Rule is Π⁰₂-Hard in the λβ-Calculus}",
	year          = 2004,
}