@article {ancoli1997variations,
	title = {Variations in circadian rhythms of activity, sleep, and light exposure related to dementia in nursing-home patients},
	journal = {Sleep},
	volume = {20},
	number = {1},
	year = {1997},
	pages = {18{\textendash}23},
	publisher = {Oxford University Press},
	author = {Ancoli-Israel, Sonia and Klauber, Melville R and Jones, Denise Williams and Kripke, Daniel F and Martin, Jennifer and Mason, William and Pat-Horenczyk, Ruth and Fell, Robert}
}
