@inproceedings{SPLC-2005-Batory,
	author        = "Don S. Batory",
	booktitle     = "{Proceedings of the Ninth International Software Product Line Conference}",
	doi           = "10.1007/11554844_3",
	isbn          = "3-540-28936-4",
	pages         = "7--20",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Feature Models, Grammars, and Propositional Formulas}",
	volume        = 3714,
	year          = 2005,
}