1. R. Bube, Photoconductivity of Solids (Wiley, New York, 1960; Inostr. Liter., Moscow, 1962).
2. V. G. Butkevich, V. D. Bochkov, and E. R. Globus, Prikl. Fiz., No. 6, 66 (2001).
3. Yu. I. Ravich, B. A. Efimova, and I. A. Smirnov, Semiconducting Lead Chalcogenides (Nauka, Moscow, 1968; Plenum Press, New York, 1970).
4. A. E. Gamarts, V. M. Lebedev, V. A. Moshnikov, and D. B. Chesnokovsa, Fiz. Tekh. Poluprovodn. 38, 1195 (2004) [Semiconductors 38, 1160(2004)].
5. A. E. Gamarts, V. A. Moshnikov, and D. B. Chesnokova, Fiz. Tekh. Poluprovodn. 40, 683 (2006) [Semiconductors 40, 662 (2006)].