@incollection{Żygis2008,
  author    = {Marzena Żygis},
  title     = {On the avoidance of voiced sibilant affricates},
  booktitle = {Papers in phonetics and phonology, Zentrum f{\"u}r Allgemeine Sprachwissenschaft, Berlin; ZASPil Vol. 49, S. 23-45},
  volume    = {49},
  url       = {http://www.zas.gwz-berlin.de/175.html},
  year      = {2008},
}