@inproceedings{SIGMOD-1987-Butler,
	author        = "Margaret H. Butler",
	booktitle     = "{Proceedings of the 17th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD87/P410.PDF",
	doi           = "10.1145/38713.38757",
	pages         = "410--425",
	title         = "{Storage Reclamation in Object Oriented Database Systems}",
	year          = 1987,
}