@book{212752,
	author = {Hofmann, Karl Heinrich. and ebrary, Inc.},
	title = {Semigroups in algebra, geometry, and analysis},
	publisher = {Walter de Gruyter,},
	year = {1995.},
	series = {De Gruyter expositions in mathematics,},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10598048}
}