1. Kerrebrock, J L , "Conduction in gases with elevated electron temperature, ' Engineering Aspects of Magnetohydro dynamics (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
2. Massey, H S W and Burhop, E H S, Electronic and Ionic Impact Phenomena (Oxford University Press, New York 1956), p279
3. Theory of Nonthermal Ionization in Cesium Discharges