1. A. V. Timofeev, Zh. Tekh. Fiz., 33:909 (1963).
2. A. V. Timofeev, Sov. Phys. — Tech. Phys., 8:682 (1964). It is shown that a weakly ionized plasma with an inhomogeneous density is unstable. The excitation of oscillations with kz = 0 is considered.
3. G. M. Zaslavskii, S. S. Moiseev, and V. N. Oraevskii, Zh. Prikl. Mekh. Tekh. Fiz., No. 6, p. 29 (1963). Study of growth of excitations with kz ≠ 0; see also [6] below.
4. J. C. Woo and D. J. Rose, Phys. Rev. Lett., 19:104 (1967). The authors develop ideas similar to those put forward in [1] concerning the possible development of an instability in a current-free plasma. An instability condition of a fairly general form is obtained.
5. I. S. Baikov and A. A. Rukhadze, Zh. Tekh. Fiz., 38:1619 (1963).