@inproceedings{LICS-2012-KrebsS,
	author        = "Andreas Krebs and A. V. Sreejith",
	booktitle     = "{Proceedings of the 27th Annual IEEE Symposium on Logic in Computer Science}",
	doi           = "10.1109/LICS.2012.55",
	isbn          = "978-1-4673-2263-8",
	pages         = "451--460",
	publisher     = "{IEEE Computer Society}",
	title         = "{Non-definability of Languages by Generalized First-order Formulas over (N, +)}",
	year          = 2012,
}