[1] Förch, W. (2012): Community Resilience in Drylands and Implications for Local Development in Tigray, Ethiopia. Ph.D. thesis, The University of Arizona, Tucson, AZ, USA. http://arizona.openrepository.com/arizona/handle/10150/265354.

[2] Janssen, M. A.; Schoon, M. L.; Ke, W. and Börner, K. (2006): Scholarly networks on resilience, vulnerability and adaptation within the human dimensions of global environmental change. Global Environmental Change 16(3): pp. 240–252. http://www.sciencedirect.com/science/article/pii/S0959378006000367.