2012 · Sudipto Bhattacharya, Georgy Chabakauri, et al. · London School of Economics and Political Science Research Online (London School of Economics and Political Science) · 2
2011 · Sudipto Bhattacharya, Georgy Chabakauri, et al. · London School of Economics and Political Science Research Online (London School of Economics and Political Science) · 1