@inproceedings{LICS-1998-MullerNT,
	author        = "Martin Müller and Joachim Niehren and Ralf Treinen",
	booktitle     = "{Proceedings of the 13th Annual IEEE Symposium on Logic in Computer Science}",
	doi           = "10.1109/LICS.1998.705677",
	isbn          = "0-8186-8506-9",
	pages         = "432--443",
	publisher     = "{IEEE Computer Society}",
	title         = "{The First-Order Theory of Ordering Constraints over Feature Trees}",
	year          = 1998,
}