@article {welch_mean_1983,
	title = {A mean squared error criterion for the design of experiments},
	journal = {Biometrika},
	volume = {70},
	number = {1},
	year = {1983},
	pages = {205{\textendash}213},
	url = {http://biomet.oxfordjournals.org/content/70/1/205.short},
	author = {Welch, William J.}
}
