@article {schaden09,
	title = {Present Perfects Compete},
	journal = {Linguistics and Philosophy},
	volume = {32},
	year = {2009},
	pages = {115{\textendash}141},
	keywords = {ACL},
	doi = {10.1007/s10988-009-9056-3},
	author = {Gerhard Schaden}
}
