@inproceedings{ILPC-1984-Johansson84,
	author        = "Anna-Lena Johansson",
	booktitle     = "{Proceedings of the Second International Logic Programming Conference}",
	pages         = "243--251",
	publisher     = "{Uppsala University}",
	title         = "{Using Symmetry for the Derivation of Logic Programs}",
	year          = 1984,
}