@incollection{Bittner2013,
  author    = {Dagmar Bittner},
  title     = {Aspectual interpretation of early verb forms in german},
  booktitle = {Acquisition of aspect / Ed. by Dagmar Bittner \& Natalia Gagarina, , Zentrum f{\"u}r Allgemeine Sprachwissenschaft, Sprachtypologie und Universalienforschung, Berlin, 2003; ZAS papers in linguistics Vol. 29},
  volume    = {29},
  url       = {http://www.zas.gwz-berlin.de/fileadmin/material/ZASPiL_Volltexte/zp29/zaspil29-bittner.pdf},
  year      = {2013},
}