@inproceedings{STOC-1994-BodlaenderFH,
	author        = "Hans L. Bodlaender and Michael R. Fellows and Michael T. Hallett",
	booktitle     = "{Proceedings of the 26th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/195058.195229",
	isbn          = "0-89791-663-8",
	pages         = "449--458",
	publisher     = "{ACM}",
	title         = "{Beyond NP-completeness for problems of bounded width: hardness for the W hierarchy}",
	year          = 1994,
}