@inproceedings{SLP-1987-Chen87,
	author        = "Weidong Chen",
	booktitle     = "{Proceedings of the Fourth Symposium on Logic Programming}",
	isbn          = "0-8186-0799-8",
	pages         = "24--33",
	publisher     = "{IEEE-CS}",
	title         = "{A Theory of Modules Based on Second-Order Logic}",
	year          = 1987,
}