@book{207409,
	author = {Matuttis, Hans-Georg, and Chen, J. F.},
	title = {Understanding the discrete element method : simulation of non-spherical particles for granular and multi-body systems /},
	publisher = {Wiley,},
	year = {2014.},
	address = {Singapore :},
	url = {http://onlinelibrary.wiley.com/book/10.1002/9781118567210}
}