1. S. A. Akhmanov, R. V. Khokhlov: Problems of Nonlinear Optics (VINITI, Moscow 1964) [In Russian]
2. N. Bloembergen: Nonlinear Optics (Benjamin, New York 1965)
3. F. Zernike, J. E. Midwinter: Applied Nonlinear Optics (Wiley, New York 1973)
4. V. Dmitriev, L. Tarasov: Optique Non Linéaire Appliquée (MIR, Moscow 1987)
5. Yu. V. Voroshilov, D. N. Nikogosyan: Kvantovaya Elektron. 3, 608 (1976) [English transl.: Sov. J. Quantum Electron. 6, 326 (1976)]