@inproceedings{STOC-1991-Nisan,
	author        = "Noam Nisan",
	booktitle     = "{Proceedings of the 23rd Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/103418.103462",
	isbn          = "0-89791-397-3",
	pages         = "410--418",
	publisher     = "{ACM}",
	title         = "{Lower Bounds for Non-Commutative Computation}",
	year          = 1991,
}