@inproceedings{STOC-1993-CondonFLS,
	author        = "Anne Condon and Joan Feigenbaum and Carsten Lund and Peter W. Shor",
	booktitle     = "{Proceedings of the 25th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/167088.167190",
	isbn          = "0-89791-591-7",
	pages         = "305--314",
	publisher     = "{ACM}",
	title         = "{Probabilistically checkable debate systems and approximation algorithms for PSPACE-hard functions}",
	year          = 1993,
}