GC: n S: http://people.csail.mit.edu/pkrafft/papers/krafft-et-al-2015-emergent.pdf (last access: 7 July 2015); http://gap.hks.harvard.edu/evidence-collective-intelligence-factor-performance-human-groups (last access: 7 July 2015). N: S: SYN: S: CR:
