1. Aleksandrov, A. D., Kolgomorov, A. N., Lavrent’ev (eds.): Mathematics. Its concepts, Methods, and Meaning, The M.I.T. Press, Cambridge, Massachusetts, 1963.
2. ASTM,: 1969 Book of ASTM Standards, The American Society for Testing and Materials, Philadelphia, Pennsylvania, 1969.
3. Born, M. and Wolf, E.: Pricciples of Optics, Pergamon Press, Oxford-New York, 1975
4. Doeblin, E. O.: Measurement Systems: Application and Design, McGrow-Hill Book Co., New York, 1983.
5. Feynman, R.: The Character of Physical Law, MIT Press, Cambridge, Massachusetts, 1993.