1. Building a manufacturing cladogram
2. Zohar, D., and I. Marshall (2001), SQ: Spiritual Intelligence, London: Bloomsbury
3. Manufacturing classification
4. Dopfer, K. (2001), ‘History-friendly theories in economics: reconciling universality and context in evolutionary analysis’, in J. Foster and J. S. Metcalfe (eds.), Frontiers of Evolutionary Economics, Cheltenham: Edward Elgar
5. McKelvey, B. (1982), Organizational Systematics, Berkeley and Los Angeles: University of California Press