@article {crainiceanu2009nonparametric,
	title = {Nonparametric signal extraction and measurement error in the analysis of electroencephalographic activity during sleep},
	journal = {Journal of the American Statistical Association, PMCID: PMC2802498},
	volume = {104},
	number = {486},
	year = {2009},
	pages = {541{\textendash}555},
	publisher = {ASA},
	author = {Crainiceanu, C and Caffo, B and Di, C and Punjabi, N}
}
