1. Andrews KE, Christensen LE et al (1965) Business policy. Text and Cases, Homewood, 111, Richard D Irwin
2. Barnard CI (1938) The functions of the executive, Thirtieth Anniversary Editionth edn. Harvard University Press, Cambridge
3. Bateson G (1972) Steps to an ecology of mind. Ballantine, New York
4. Bateson G (1991) Ecology of mind: the sacred. In: Donaldson R (ed) A sacred unity: further steps to an ecology of mind. Harper Collins, New York
5. Beckman T (1997) A methodology for knowledge management. International Association of Science and Technology for Development (IASTED) AI and Soft Computing Conference. Banff, Canada