@inproceedings{LICS-2009-DawarGHL,
	author        = "Anuj Dawar and Martin Grohe and Bjarki Holm and Bastian Laubner",
	booktitle     = "{Proceedings of the 24th Annual IEEE Symposium on Logic in Computer Science}",
	doi           = "10.1109/LICS.2009.24",
	isbn          = "978-0-7695-3746-7",
	pages         = "113--122",
	publisher     = "{IEEE Computer Society}",
	title         = "{Logics with Rank Operators}",
	year          = 2009,
}