@book{33189,
	author = {Hsiang, Wu Yi, and ebrary, Inc.},
	title = {Least action principle of crystal formation of dense packing type and the proof of Kepler's conjecture},
	publisher = {World Scientific,},
	year = {2001.},
	address = {Singapore ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10255610}
}