1. V. V. Pasynkov and L. K. Chirkin, Semiconductor Devices (Lan’, St. Petersburg, 2003) [in Russian].
2. V. D. Dobykin, Radiotekh. Elektron. (Moscow) 45, 1389 (2000) [J. Commun. Technol. Electron. 45, 1256 (2000)].
3. Yu. P. Raizer, Gas Discharge Physics (Nauka, Moscow, 1987; Springer-Verlag, Berlin, 1991).
4. A. D. Polyanin, A. V. Vyaz’min, A. I. Zhurov, and D. A. Kazenin, Handbook on Exact Solutions of Heat- and Mass-Transfer Equations (Faktorial, Moscow, 1998) [in Russian].
5. V. Ya. Arsenin, Basic Equations and Special Functions of Mathematical Physics (Nauka, Moscow, 1966; Iliffe Books, London, 1968).