2016 · Simon Hix, Sara Hagemann, et al. · London School of Economics and Political Science Research Online (London School of Economics and Political Science) · 16
2015 · Simon Hix, Sara Hagemann · London School of Economics and Political Science Research Online (London School of Economics and Political Science) · 5
2008 · Sara Hagemann, Simon Hix · London School of Economics and Political Science Research Online (London School of Economics and Political Science) · 3