@incollection{Nawrocki2009,
  author    = {Grzegorz Nawrocki},
  title     = {Laryngeal articulations of /x/ in Southern Polish},
  booktitle = {Papers in phonetics and phonology, Zentrum f{\"u}r Allgemeine Sprachwissenschaft, Berlin; ZASPil Vol. 49, S. 145-165},
  volume    = {49},
  url       = {http://www.zas.gwz-berlin.de/175.html},
  year      = {2009},
}