@article {3991,
	title = {Maintaining Materialized Views Without Accessing Base Data},
	journal = {Information Systems},
	volume = {13},
	year = {1988},
	pages = {393--406},
	doi = {10.1016/0306-4379(88)90005-1},
	author = {Frank Tompa and Jos{\'e} A. Blakeley}
}
