@inproceedings{SLP-1986-MannilaU86,
	author        = "Heikki Mannila and Esko Ukkonen",
	booktitle     = "{Proceedings of the Third Symposium on Logic Programming}",
	isbn          = "0-8186-0728-9",
	pages         = "159--165",
	publisher     = "{IEEE-CS}",
	title         = "{Timestamped Term Representation for Implementing Prolog}",
	year          = 1986,
}