@incollection{Kotin2013,
  author    = {Michail L. Kotin},
  title     = {Zur Diachronie des Verbs "werden" : Vollverb - Kopula - Auxiliar},
  booktitle = {Copular and aux-constructions, Zentrum f{\"u}r Allgemeine Sprachwissenschaft, Sprachtypologie und Universalienforschung, Berlin, 2000; ZAS papers in linguistics Vol. 16},
  volume    = {16},
  url       = {http://www.zas.gwz-berlin.de/210.html},
  year      = {2013},
}