M. Cristelli, L. Pietronero, and A. Zaccaria. (2011)cite arxiv:1101.1847Comment: 51 pages, 9 figures, Proceedings of the School of Physics "E. Fermi", course CLXXVI, 2010, Varenna.
S. Cranefield. Coordination, Organizations, Institutions, and Norms in Agent Systems IX, volume 8386 of Lecture Notes in Artificial Intelligence, Springer, (2014)