@workingPaper{EmrichPierdziochRullang_2016,
title={For the love of football? Using economic models of volunteering to study the motives of German football referees},
author={Emrich, Eike and Pierdzioch, Christian and Rullang, Christian},
editor={Emrich, Eike and Pierdzioch, Christian and Klein, Markus},
doi={http://dx.doi.org/10.22028/D291-27038},
adress={Saarbrücken},
publisher={Europäisches Institut für Sozioökonomie e.V.},
year={2016}
}