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. Zernicke, J.E. Midwinter: Applied Nonlinear Optics ( Wiley, New York 1973 )
4. V.G. Dmitriev, L.V. Tarasov: Optique Non Lineaire Appliquee (MIR, Moscow 1987). [Translated from Russian: V.G. Dmitriev, L.V. Tarasov, Prikladnaya Nelineinaya Optika (Radio i Sviyaz, Moscow 1982)]
5. Y.V. Voroshilov, D.N. Nikogosyan: Kvantovaya Elektron. 3, 608–610 (1976) [English transl.: Soy. J. Quantum Electron. 6, 326–327 (1976)]