@inproceedings{SIGMOD-1989-TanselG,
	author        = "Abdullah Uz Tansel and Lucy Garnett",
	booktitle     = "{Proceedings of the 19th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD89/P284.PDF",
	doi           = "10.1145/67544.66953",
	pages         = "284--294",
	title         = "{Nested Historical Relations}",
	year          = 1989,
}