@inproceedings{SIGMOD-1978-Olle,
	author        = "T. William Olle",
	booktitle     = "{Proceedings of the Eighth ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD78/P088.PDF",
	doi           = "10.1145/509252.509276",
	pages         = "88",
	publisher     = "{ACM}",
	title         = "{The Conceptual Schema Controversy}",
	year          = 1978,
}