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Marinov Y.G., Hinov H.P. Optimizing the physical parameters of longitudinal flexoelectric domains (variable-grating modes) on which ac and dc voltages act at the same time [in Russian] // Opticheskii Zhurnal. 2005. V. 72. No 12. P. 70-78.

Marinov Y.G., Hinov H.P. Optimizing the physical parameters of longitudinal flexoelectric domains (variable-grating modes) on which ac and dc voltages act at the same time // Journal of Optical Technology. 2005. V. 72. № 12. P. 944-950. https://doi.org/10.1364/JOT.72.000944