@book{81046,
	author = {Nevalainen, Terttu. and ebrary, Inc.},
	title = {Types of variation},
	publisher = {J. Benjamins,},
	year = {2006.},
	series = {Studies in language companion series,},
	address = {Amsterdam ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10126068}
}