1. S. C. Brown,Basic Data of Plasma Physics(John Wiley & Sons, Inc., New York, 1959), p. 258 ff.
2. H. J. White,Industrial Electrostatic Precipitator(Addison-Wesley Publishing Company, Inc., Massachusetts, 1963), p. 90 ff. K. K. Darrow,Electrical Phenomena in Gases(Williams and Wilkins, Baltimore, Maryland, 1932), p. 443 ff.
3. Cospar International Reference Atmosphere, compiled by: H. Kallmann-Bijl, R. L. F. Boyd, H. Lagow, S. M. Poloskov, and W. Priester (Interscience Publishers, Inc., New York, 1961).
4. U.S. standard atmosphere, 1962.
5. R. G. Fleagle and J. A. Businger,An Introduction to Atmospheric Physics(Academic Press Inc., New York, 1963), p. 21 ff.