@inproceedings{CSL-1990-HertrampfW,
	author        = "Ulrich Hertrampf and Klaus W. Wagner",
	booktitle     = "{Proceedings of the Fourth Workshop on Computer Science Logic}",
	doi           = "10.1007/3-540-54487-9_63",
	isbn          = "3-540-54487-9",
	pages         = "261--273",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Interactive Proof Systems: Provers, Rounds, and Error Bounds}",
	volume        = 533,
	year          = 1990,
}