@inproceedings{SIGMOD-1987-Morgenstern,
	author        = "Matthew Morgenstern",
	booktitle     = "{Proceedings of the 17th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD87/P357.PDF",
	doi           = "10.1145/38713.38752",
	pages         = "357--373",
	title         = "{Security and Inference in Multilevel Database and Knowledge-Base Systems}",
	year          = 1987,
}