Y. Edmund Lien
Multivalued Dependencies with Null Values in Relational Data Bases
VLDB, 1979.
@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, }