@book{229462,
	author = {Ivanov, Stefan P. and Vassilev, Dimiter N. and ebrary, Inc.},
	title = {Extremals for the Sobolev inequality and the quaternionic contact Yamabe problem},
	publisher = {World Scientific,},
	year = {c2011.},
	address = {Singapore ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10493495}
}