1. R. Nelson, IRE Trans. ED-6, no. 3, 270, 1959.
2. S. S. Gutin and A. O. Pusep, Izv. VUZ. Fizika, no. 1, 103, 1963.
3. V. A. Presnov and G. A. Kataev, collection: Semiconductor Devices and Their Application [in Russian], ed. Fedotova, vol. 8, 26, 1962.
4. Electron-Hole Junctions in Semiconductors [in Russian], Tashkent, 1962.
5. Physics of Semiconductor Surfaces [in Russian], ed. Pikus, 1959.