1. Bondy A, Murty USR (2008) Graph theory. Springer, Berlin
2. Bunge M (2011) Causality and modern science, 3rd revised edn. Courier Corporation, DOVER Publications, Inc., Mineola
3. Conant RC, Ross Ashby W (1970) Every good regulator of a system must be a model of that system. Int J Syst Sci 89–97
4. Deming WE (1993) The new economics for industry, government and education. Massachusetts Institute of Technology, Center for Advanced Engineering Study, Cambridge
5. Dietz JLG (2003) The atoms, molecules and fibers of organizations. Data Knowl Eng 47(3):301–325