The photovoltaic and photorefractive effects in noncentrosymmetric materials / Boris I. Sturman (Institute of Automation and Electrometry, Russian Academy of Sciences, Siberian Branch Novosibirsk) ; Vladimir M. Fridkin (Institute of Crystallography, Russian Academy of Sciences, Moscow) ; translated from the Russian by J.E.S. Bradley. Boca Raton ; London ; New York : CRC Press, 1992 ; © 1992