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