@inproceedings{SIGMOD-1990-KemperM,
	author        = "Alfons Kemper and Guido Moerkotte",
	booktitle     = "{Proceedings of the 20th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD90/P364.PDF",
	doi           = "10.1145/93597.98745",
	pages         = "364--374",
	title         = "{Access Support in Object Bases}",
	year          = 1990,
}