Coevolutionary dynamics of opinion propagation and social balance: The key role of small-worldness Yan Chen, Lixue Chen, Xian Sun, Kai Zhang, Jie Zhang and Ping Li Eur. Phys. J. B, 87 3 (2014) 62 Published online: 12 March 2014 DOI: 10.1140/epjb/e2014-41008-7