@inproceedings{PODS-2013-Wong,
	author        = "Limsoon Wong",
	booktitle     = "{Proceedings of the 32nd Symposium on Principles of Database Systems}",
	doi           = "10.1145/2463664.2463670",
	isbn          = "978-1-4503-2066-5",
	pages         = "285--296",
	publisher     = "{ACM}",
	title         = "{A dichotomy in the intensional expressive power of nested relational calculi augmented with aggregate functions and a powerset operator}",
	year          = 2013,
}