@inproceedings{SIGMOD-1979-Codd,
	author        = "E. F. Codd",
	booktitle     = "{Proceedings of the Ninth ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD79/P161.PDF",
	doi           = "10.1145/582095.582122",
	isbn          = "0-89791-001-X",
	pages         = "161",
	publisher     = "{ACM}",
	title         = "{Extending the Data Base Relational Model to Capture More Meaning}",
	year          = 1979,
}