@inproceedings{PODS-2010-MeierSWL,
	author        = "Michael Meier and Michael Schmidt and Fang Wei and Georg Lausen",
	booktitle     = "{Proceedings of the 29th Symposium on Principles of Database Systems}",
	doi           = "10.1145/1807085.1807102",
	isbn          = "978-1-4503-0033-9",
	pages         = "111--122",
	publisher     = "{ACM}",
	title         = "{Semantic query optimization in the presence of types}",
	year          = 2010,
}