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Hemsel, T., &; Twiefel, J. (2022). Piezoelectric Ultrasonic Power Transducers. In Reference Module in Materials Science and Materials Engineering. Elsevier.https://doi.org/10.1016/b978-0-12-819728-8.00047-4 

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Bornmann, P., Hemsel, T., Littmann, W., Ageba, R., Kadota, Y., &; Morita, T. (2010). Ultrasonic Transducer for the Hydrothermal Method. Journal of Korean Physical Society, 57(4), 1122.https://doi.org/10.3938/jkps.57.1122 

Fu, B., Li, C., Zhang, J., Huang, Z., &; Hemsel, T. (2010). Modeling of Piezoelectric Langevin Transducers by Using Mixed Transfer Matrix Methods. Journal of Korean Physical Society, 57(4), 929.https://doi.org/10.3938/jkps.57.929 

Hemsel, T., Lierk, E. G., Littmann, W., &; Morita, T. (2010). Various Aspects of the Placement of a Piezoelectric Material in Composite Actuators, Motors, and Transducers. Journal of Korean Physical Society, 57(4), 933–937.https://doi.org/10.3938/jkps.57.933 

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