@inproceedings{CAAP-1987-NavarroO,
	author        = "Marisa Navarro and Fernando Orejas",
	booktitle     = "{Proceedings of the Second International Joint Conference on Theory and Practice of Software Development, Volume 1: Colloquium on Trees in Algebra and Programming}",
	doi           = "10.1007/3-540-17660-8_56",
	isbn          = "3-540-17660-8",
	pages         = "202--216",
	publisher     = "{Springer}",
	title         = "{Parameterized Horn Clause Specifications: Proof Theory and Correctness}",
	year          = 1987,
}