@incollection{Liu:Soehn:09,
author =     {Mingya Liu and Jan-Philipp Soehn},
title =      {{Empirical Perspective on Positive Polarity Items in German}},
booktitle =  {The Fruits of Empirical Linguistics},
volume =     {2: Product}
editor =     {Susanne Winkler and Sam Featherston},
publisher =  {Mouton de Gruyter},
pages =      {197--216},
year =       {2009}
}