@book{28704,
	author = {Tretter, Christiane. and ebrary, Inc.},
	title = {Spectral theory of block operator matrices and applications},
	publisher = {Imperial College Press ;},
	year = {c2008.},
	address = {London :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10687999}
}