[1]
Bieber, I.E. and Bytzek, E. 2012. Online-Surveys: An appropriate survey method for electoral research? A comparison of different survey modes in use at the 2009 German Federal Election. methods, data, analyses. 6, 2 (Dec. 2012), 185–211. DOI:https://doi.org/10.12758/mda.2012.011.