@article {nadi.ea:2015:tse,
	title = {Where do Configuration Constraints Stem From? An Extraction Approach and an Empirical Study},
	journal = {IEEE Transactions on Software Engineering},
	year = {2015},
	note = {preprint},
	author = {Sarah Nadi and Thorsten Berger and K{\"a}stner, Christian and Krzysztof Czarnecki}
}