@book{34671,
	author = {Cheng, S. S. and Li, Wenrong. and ebrary, Inc.},
	title = {Analytic solutions of functional equations},
	publisher = {World Scientific,},
	year = {c2008.},
	address = {Singapore ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10255758}
}