@inproceedings{SIGMOD-1982-KowarskiL,
	author        = "Irene Kowarski and M. Lopez",
	booktitle     = "{Proceedings of the 12th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD82/P276.PDF",
	doi           = "10.1145/582353.582405",
	pages         = "276--283",
	publisher     = "{ACM Press}",
	title         = "{The Document Concept in a Data Base}",
	year          = 1982,
}