@book{33259,
	author = {Borwein, Jonathan M. and Zhu, Qiji J. and Zhu, Qiji J. ; jt. auth.},
	title = {Techniques of variational analysis},
	publisher = {Springer Science+Business Media, Inc.},
	year = {2005},
	series = {CMS books in mathematics},
	address = {New York}
}