@inproceedings{CAAP-1985-Makowsky,
	author        = "Johann A. Makowsky",
	booktitle     = "{Proceedings of the First International Joint Conference on Theory and Practice of Software Development, Volume 1: Colloquium on Trees in Algebra and Programming}",
	doi           = "10.1007/3-540-15198-2_24",
	isbn          = "3-540-15198-2",
	pages         = "374--387",
	publisher     = "{Springer}",
	title         = "{Why Horn Formulas Matter in Computer Science: Initial Structures and Generic Examples (Extended Abstract)}",
	year          = 1985,
}