@book{4113,
	author = {Batschelet, Edward.},
	title = {Introduction to mathematics for life scientists /},
	publisher = {Springer-Verlag,},
	year = {1979.},
	address = {Berlin ;},
	edition = {3d ed.},
	note = {"Springer study edition."},
	url = {http://www.loc.gov/catdir/enhancements/fy0907/79021113-d.html}
}