@book{32759,
	author = {Singer, Ivan. and SpringerLink (Online service)},
	title = {Duality for Nonconvex Approximation and Optimization},
	publisher = {Springer New York,},
	year = {2006.},
	series = {CMS Books in Mathematics,},
	address = {New York, NY :},
	url = {http://dx.doi.org/10.1007/0-387-28395-1}
}