@inproceedings{VLDB-1979-Lien,
	author        = "Y. Edmund Lien",
	booktitle     = "{Proceedings of the Fifth International Conference on Very Large Data Bases}",
	cdrom         = "VLDB79/P061.PDF",
	pages         = "61--66",
	publisher     = "{IEEE Computer Society}",
	title         = "{Multivalued Dependencies with Null Values in Relational Data Bases}",
	year          = 1979,
}