@article {Hanson:April 2009:1750-676X:61,
	author = "Hanson, Robin",
	title = "On Market Maker Functions",
	journal = "The Journal of Prediction Markets",
	volume = "3",
	year = "April 2009",
	abstract = "",
	pages = "61-63(3)",
	url = "http://www.ingentaconnect.com/content/ubpl/jpm/2009/00000003/00000001/art00007"
}