@article {welch_system_1991,
	title = {A system for quality improvement via computer experiments},
	journal = {Communications in Statistics-Theory and Methods},
	volume = {20},
	number = {2},
	year = {1991},
	pages = {477{\textendash}495},
	url = {http://www.tandfonline.com/doi/abs/10.1080/03610929108830510},
	author = {Welch, William J. and Sacks, Jerome}
}
