1. L. M. Chanin, inGaseous Electronics, edited by M. N. Hirsh and H. J. Oskam (Academic, New York, 1978), Chap. 2, Part 2.3.
2. Volume Forces in Plasmas
3. Axial Pressure Gradient in Direct-Current Discharges
4. The no-slip boundary condition vdNx(ρ = 1) = 0 at the wall is valid as long as the Knudsen number is small.
5. J. H. Ingold, in Ref. 1, Chap. 2, Part 2.1.