@book{16939,
	author = {Schulz, G. E. and Schirmer, R. Heiner,},
	title = {Principles of protein structure /},
	publisher = {Springer-Verlag,},
	year = {c1979.},
	address = {New York :},
	url = {http://www.loc.gov/catdir/enhancements/fy0814/78011500-d.html}
}