@book{111,
	author = {Efron, Bradley. and Tibshirani, Robert.},
	title = {An introduction to the bootstrap /},
	publisher = {Chapman & Hall,},
	year = {c1994.},
	address = {New York :},
	url = {http://www.loc.gov/catdir/enhancements/fy0730/93004489-d.html}
}