@inproceedings{STOC-1998-AharonovKN,
	author        = "Dorit Aharonov and Alexei Kitaev and Noam Nisan",
	booktitle     = "{Proceedings of the 30th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/276698.276708",
	isbn          = "0-89791-962-9",
	pages         = "20--30",
	publisher     = "{ACM}",
	title         = "{Quantum Circuits with Mixed States}",
	year          = 1998,
}