@article {gu1992note,
	title = {A note on generalized cross-validation with replicates},
	journal = {Statistics \& probability letters},
	volume = {14},
	number = {4},
	year = {1992},
	pages = {283{\textendash}287},
	publisher = {Elsevier},
	author = {Gu, Chong and Heckman, Nancy and Wahba, Grace}
}
