1. See, for example,L. G. H. Huxley andR. W. Crompton:The Diffusion and Drift of Electrons in Gases, Chap. 13 (New York, N. Y., 1974).
2. G. Cavalleri:Nuovo Cimento B,55, 340 (1980).
3. G. Cavalleri andR. Bonalumi:Nuovo Cimento B,55, 375 (1980).
4. For the best measurements of the drift velocity see all the works made in the Ion Diffusion Unit of the Research School of Physical Sciences, Canberra University, Australia. The results published within 1974 are collected in ref. (1). See, for example,L. G. H. Huxley andR. W. Crompton:The Diffusion and Drift of Electrons in Gases, Chap. 13 (New York, N. Y., 1974).
5. S. Chapman andT. G. Cowling:The Mathematical Theory of Nonuniform Gases, 2nd edition (Cambridge, 1952), p. 350 (see also subsect.1.11 of ref. (1)). See, for example,L. G. H. Huxley andR. W. Crompton:The Diffusion and Drift of Electrons in Gases, Chap. 13 (New York, N. Y., 1974).