1. Kerrebrock, J L , "Conduction in gases with elevated electron temperature," Engineering Aspects of Magnetohydrodynamics (Columbia University Press, New York, 1962), p327; also "Non equilibrium effects on conductivity and electrode heat transfer in ionized gases, ' Daniel and Florence Guggenheim Jet Propulsion Center California Institute of Technology, TN 4 (November 1960)
2. Karlowitz, B and Halasz, D , U S Patent 2,210,918 (August 13,1940)
3. Massey, H S W and Burhop, E H S, Electronic and Ionic Impact Phenomena (Oxford University Press, New York, 1956), p279