@inproceedings{SIGMOD-1988-GyssensG,
	author        = "Marc Gyssens and Dirk Van Gucht",
	booktitle     = "{Proceedings of the 18th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD88/P225.PDF",
	doi           = "10.1145/50202.50230",
	pages         = "225--232",
	title         = "{The Powerset Algebra as a Result of Adding Programming Constructs to the Nested Relational Algebra}",
	year          = 1988,
}