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