@inproceedings{VLDB-1990-KaferRS,
	author        = "Wolfgang Käfer and Norbert Ritter and Harald Schöning",
	booktitle     = "{Proceedings of the 16th International Conference on Very Large Data Bases}",
	ee            = "http://www.vldb.org/conf/1990/P024.PDF",
	isbn          = "1-55860-149-X",
	pages         = "24--35",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Support for Temporal Data by Complex Objects}",
	year          = 1990,
}