1. EUSEC conference, Copenhagen, September 1966.
2. Ghiselin, B. The Creative Process. New American Library, Ncw York, 1952.
3. Ruhemann, M. The Separation of Gases. Oxford University Press, 1949.
4. Moulton makes a better bicycle… again.’ Engineering
233, no. 7, p. 547, 1983.
5. Jung, I. `Swedish Marine Turbine and Gear Development.’ Society of Naval Architects and Marine Engineers, Spring Meeting, 1966.