@inproceedings{STOC-2013-Sherstov,
	author        = "Alexander A. Sherstov",
	booktitle     = "{Proceedings of the 45th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/2488608.2488725",
	isbn          = "978-1-4503-2029-0",
	pages         = "921--930",
	publisher     = "{ACM}",
	title         = "{Communication lower bounds using directional derivatives}",
	year          = 2013,
}