1. A. Ambroso, Stability for solutions of a stationary Euler–Poisson problem, Math. Models Methods Appl. Sci. 16 (2006), 1817–1837.
2. A. Ambroso, F. Méhats and P.-A. Raviart, On singular perturbation problems for the nonlinear Poisson equation, Asympt. Anal. 25 (2001), 39–91.
3. D. Bohm, Minimum ionic kinetic energy for a stable sheath, in The characteristics of electrical discharges in magnetic fields, A. Guthrie and R.K.Wakerling eds., McGraw-Hill, New York, (1949), 77–86.
4. R. L. F. Boyd and J. B. Thompson, The Operation of Langmuir Probes in Electro-Negative Plasmas, Proc. R. Soc. Lond. A 252 (1959), 102–119.
5. F. F. Chen, Introduction to Plasma Physics and Controlled Fusion, 2$$^{nd}$$ edition, Springer, 1984.