@incollection{HamannFuchs2008,
  author    = {Silke Hamann and Susanne Fuchs},
  title     = {How do voiced retroflex stops evolve? : Evidence from typology and an articulatory study},
  booktitle = {Papers in phonetics and phonology, Zentrum f{\"u}r Allgemeine Sprachwissenschaft, Berlin; ZASPil Vol. 49, S. 97-130},
  volume    = {49},
  url       = {http://www.zas.gwz-berlin.de/175.html},
  year      = {2008},
}