@article {chen2002using,
	title = {Using empirical likelihood methods to obtain range restricted weights in regression estimators for surveys},
	journal = {Biometrika},
	volume = {89},
	number = {1},
	year = {2002},
	pages = {230{\textendash}237},
	publisher = {Biometrika Trust},
	author = {Chen, J and Sitter, RR and Wu, C}
}
