@incollection{DresslerKilaniSchochBittner2013,
  author    = {Wolfgang U. Dressler and Marianne Kilani-Schoch and Dagmar Bittner},
  title     = {First tentative conclusions on the early development of verb morphology},
  booktitle = {First verbs : on the way to mini-paradigms / ed. by Dagmar Bittner, Zentrum f{\"u}r Allgemeine Sprachwissenschaft, Sprachtypologie und Universalienforschung, Berlin, 1999; ZAS papers in linguistics Vol. 18},
  volume    = {18},
  url       = {http://www.zas.gwz-berlin.de/208.html},
  year      = {2013},
}