@article{VLDB-J-1975-NavatheF76,
	author        = "Shamkant B. Navathe and James P. Fry",
	cdrom         = "TODS1/P138.PDF",
	doi           = "10.1145/320455.320461",
	journal       = "{ACM Transactions on Database Systems}",
	number        = 2,
	pages         = "138--158",
	title         = "{Restructuring for Large Data Bases: Three Levels of Abstraction}",
	volume        = 1,
	year          = 1976,
}