@article {gao_predicting_1996,
	title = {Predicting urban ozone levels and trends with semiparametric modeling},
	journal = {Journal of Agricultural, Biological, and Environmental Statistics},
	year = {1996},
	pages = {404{\textendash}425},
	url = {http://www.jstor.org/stable/1400436},
	author = {Gao, Feng and Sacks, Jerome and Welch, William J.}
}
