@inbook {Deutsch2001,
	title = {Person in singletons, siblings, and twins},
	booktitle = {Language acquisition and conceptual development},
	year = {2001},
	pages = {284{\textendash}315},
	publisher = {Cambridge University Press},
	organization = {Cambridge University Press},
	address = {Cambridge},
	author = {Deutsch, Werner and Wagner, A. and Burchardt, R. and Schultz, N. and Nakath, J.},
	editor = {Bowerman, M. and Levinson, S. C.}
}
@article {1978,
	title = {Ihr, dir, or mir? On the acquisition of pronouns in German children},
	journal = {Cognition},
	volume = {6},
	year = {1978},
	pages = {155{\textendash}168},
	author = {Deutsch, Werner and Pechmann, Thomas}
}
