1. Difference schemes for computing three-frequency interactions of electromagnetic waves in a non-linear medium with quadratic polarization;Karamzin;Zh. vȳchisl. Mat. mat. Fiz.,1974
2. Non-stationary phenomena and the space-time analogy in non-linear optics;Akhmanov;Zh. eksp. teor. Fiz.,1968
3. Non-linear interaction of diffracting light beams in a medium with quadratic non-linearity; the interacting focussing of beams and the limitation of the efficiency of optical frequency converters;Karamzin;Letter in Zh. ETF,1974
4. The interacting focussing of powerful light beams in media with a quadratic non-linearity;Karamzin;Zh. eksp. teor. Fiz.,1975