C. Williams, and J. Spoon. European Union Politics, 16 (2):
176-193(2015)First published online: January 8, 2015, http://dx.doi.org/10.1177/1465116514564702. (EES).
G. Arikan, and P. Bloom. Political Studies, 63 (2):
431-448(2015)First published online: January 8, 2014, http:dx.doi.org/10.1111/1467-9248.12100. (ISSP).