@inproceedings{LICS-2011-MadelaineM,
	author        = "Florent R. Madelaine and Barnaby Martin",
	booktitle     = "{Proceedings of the 26th Annual IEEE Symposium on Logic in Computer Science}",
	doi           = "10.1109/LICS.2011.27",
	isbn          = "978-0-7695-4412-0",
	pages         = "311--320",
	publisher     = "{IEEE Computer Society}",
	title         = "{A Tetrachotomy for Positive First-Order Logic without Equality}",
	year          = 2011,
}