@article {3967,
	title = {Variable Independence in Constraint Databases},
	journal = {IEEE Transactions on Knowledge and Data Engineering (TKDE)},
	volume = {15},
	year = {2003},
	pages = {1422--1436},
	doi = {10.1109/TKDE.2003.1245282},
	author = {Jan Chomicki and Dina Q. Goldin and Gabriel M. Kuper and David Toman}
}
