@inproceedings{ICALP-B-2008-JezO,
	author        = "Artur Jez and Alexander Okhotin",
	booktitle     = "{Proceedings of the 35th International Colloquium on Automata, Languages and Programming, Track B: Logic, Semantics, and Theory of Programming}",
	doi           = "10.1007/978-3-540-70583-3_6",
	isbn          = "978-3-540-70582-6",
	pages         = "63--74",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{On the Computational Completeness of Equations over Sets of Natural Numbers}",
	volume        = 5126,
	year          = 2008,
}