1. M. Ardenne, Tabellen der Elektronenphysik. Ionenphysik und Ubermikroskopie (Berlin, 1956).
2. M. D. Gabovich, Ion Plasma Sources (Naukova Dumka, Kiev, 1964).
3. R. A. Demirkhanov, Yu. V. Kursanov, and V. M. Blagoveshchenskii, Prib. Tekh. Éksp., No. 1, 30 (1964).
4. O. F. Poroshin and Zh. Zh. Kutan, Production and Investigation of Intense Hydrogen-Ion Beams (Fiz. Tekh. Inst. GK Inst. At. Energ. SSSR, 1963), p. 102.
5. L. J. Christiansen and E. J. Zaharis, Rev. Sci. Instrum. 37, 1571 (1966).