@article {Smith:1 February 2001:0376-8716:249,
	author = "Smith B.J.",
	author = "Bickel W.K.",
	title = "Effects of alprazolam, caffeine, and zolpidem in humans trained to discriminate triazolam from placebo",
	journal = "Drug and Alcohol Dependence",
	volume = "61",
	year = "1 February 2001",
	abstract = "",
	pages = "249-260(12)",
	url = "http://www.ingentaconnect.com/content/els/03768716/2001/00000061/00000003/art00145"
	doi = "doi:10.1016/S0376-8716(00)00145-9"
}