@inproceedings{CSL-1987-Schoning,
	author        = "Uwe Schöning",
	booktitle     = "{Proceedings of the First Workshop on Computer Science Logic}",
	doi           = "10.1007/3-540-50241-6_43",
	isbn          = "3-540-50241-6",
	pages         = "273--280",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Complexity Cores and Hard-To-Prove Formulas}",
	volume        = 329,
	year          = 1987,
}