@inproceedings{SIGMOD-2002-Bussler,
	author        = "Christoph Bussler",
	booktitle     = "{Proceedings of the 20th ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/564691.564801",
	isbn          = "1-58113-497-5",
	pages         = "638",
	publisher     = "{ACM}",
	title         = "{Software as a service: ASP and ASP aggregation}",
	year          = 2002,
}