@book{210982,
	author = {Li, Ping, and Shirai, Yasuhiro, and ebrary, Inc.},
	title = {The acquisition of lexical and grammatical aspect},
	publisher = {Mouton de Gruyter,},
	year = {2000.},
	address = {Berlin ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10585297}
}