Hall, D. M., T. M. Swannack, E. D. Lazarus, M. J. Peterson, S. J. Gilbertz, C. C. Horton, and T. Rai Peterson. “Integrating Social Power and Political Influence into Models of Social–Ecological Systems”. European Journal of Sustainable Development, vol. 4, no. 2, June 2015, p. 61, doi:10.14207/ejsd.2015.v4n2p61.