@book{61223,
	author = {Weisstein, Eric W.},
	title = {CRC concise encyclopedia of mathematics /},
	publisher = {CRC Press,},
	year = {c1999.},
	address = {Boca Raton, Fla. :},
	note = {http://www.amazon.com/CRC-Concise-Encyclopedia-Mathematics/dp/0849396409/ref=sr_1_1?s=books&ie=UTF8&qid=1413891962&sr=1-1&keywords=0849396409}
}