BibTeX-Format:
@incollection{Klein 2009, author = {Klein, Katarina}, publisher = {Mouton de Gruyter}, year = {2009}, typ = {incollection}, title = {{S}emi-modal variation}, pages = {297-323}, booktitle = {{D}escribing and {M}odeling {V}ariation in {G}rammar}, series = {Trends in Linguistics. Studies and Monographs