@book{24955,
	author = {Venables, W. N. and Ripley, B. D. and Ripley, B. D. ; jt. auth.},
	title = {Modern applied statistics with S},
	publisher = {Springer-Verlag},
	year = {2002},
	series = {Statistics and Computing},
	address = {New York},
	edition = {4th}
}