@inproceedings{STOC-2010-LeightonM,
	author        = "Frank Thomson Leighton and Ankur Moitra",
	booktitle     = "{Proceedings of the 42nd Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/1806689.1806698",
	isbn          = "978-1-4503-0050-6",
	pages         = "47--56",
	publisher     = "{ACM}",
	title         = "{Extensions and limits to vertex sparsification}",
	year          = 2010,
}