REFERENCES
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- Fesenko , E. G. , Yu Dantsiger , A. and Razumovskaya , O. N. 1983 . “New Piezoceramic Materials” Edited by: Rgu . Rostov-on-Don in Russian
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- Isupov , V. A. , Smirnova , E. P. , Yushin , N. K. and Sotnikov , A. V. 1989 . Ferroelectrics , 95 : 179 – 183 . [CSA]