@inproceedings{LICS-1987-ImmermanK,
	author        = "Neil Immerman and Dexter Kozen",
	booktitle     = "{Proceedings of the Second Symposium on Logic in Computer Science}",
	pages         = "236--244",
	publisher     = "{IEEE Computer Society}",
	title         = "{Definability with Bounded Number of Bound Variables}",
	year          = 1987,
}