J. Howe, The rise of crowdsourcing. Wired. Issue 14, 2006.

S. Wayland, Supporting those who are left behind, 2009.

E. C. Johnson, A. L. Kristof-brown, A. E. Van-vianen, I. E. De-pater, and M. R. Klein, Expatriate Social Ties: Personality Antecedents and Consequences for Adjustment, International Journal of Selection and Assessment, vol.4, issue.2, pp.277-288, 2003.
DOI : 10.1037//0021-9010.86.2.238

X. Wang and D. Nayir, How and when is social networking important? Comparing European expatriate adjustment in China and Turkey, Journal of International Management, vol.12, issue.4, pp.449-472, 2006.
DOI : 10.1016/j.intman.2006.02.014

M. Hosseini, K. Phalp, J. Taylor, and R. Ali, The four pillars of crowdsourcing: A reference model, 2014 IEEE Eighth International Conference on Research Challenges in Information Science (RCIS), pp.1-12
DOI : 10.1109/RCIS.2014.6861072

H. Gao, . Barbier, and R. Goolsby, Harnessing the Crowdsourcing Power of Social Media for Disaster Relief, IEEE Intelligent Systems, 2011.

I. Rahwan, S. Dsouza, A. Rutherford, V. Naroditskiy, J. Mcinerney et al., Global Manhunt Pushes the Limits of Social Mobilization, Computer, vol.46, issue.4, pp.46-68, 2013.
DOI : 10.1109/MC.2012.295

I. Sarason and B. Sarason, Social support: Mapping the construct, Journal of Social and Personal Relationships, vol.26, issue.1, pp.113-120, 2009.
DOI : 10.1177/000312240607100301

URL : http://web.psych.washington.edu/research/sarason/files/SSMC.pdf