References

1. Aldo Leopold, A Sand County Almanac, Ballantine Books, New York 1982
2. Borev, Yuri, Aesthetics, Pub. Progress Publishers, Moscow, 1981
3. J. Armstrong, etc. The decision makers: ethics for engineers, Thomas Telford, London 1999
4. Lindbeck, R. John &Wygant, Robert, Product Design & Manufacture, Prentice Hall, USA 2000
5. R.G. Collingwood, The Principles of Art, Oxford University Press, New York 1958 (reprint 1998)
6. R. Birmingham, G. Cleland, etc., Understanding Engineering Design, Prentice-Hall, N. Delhi 1998