Urbano, J., H. L. Cardoso, A. P. Rocha, and E. Oliveira. “Trust and Normative Control in Multi-Agent Systems”. ADCAIJ: Advances in Distributed Computing and Artificial Intelligence Journal, vol. 1, no. 1, July 2013, pp. 43-52, doi:10.14201/ADCAIJ2012114352.