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@articleAgeba_Kadota_Maeda_Takiguchi_Morita_Ishikawa_Bornmann_Hemsel_2010, title=Ultrasonically-assisted Hydrothermal Method for Ferroelectric Material Synthesis, volume=57, DOI=10.3938/jkps.57.918, number=4, journal=Journal of Korean Physical Society, author=Ageba, Ryo and Kadota, Yoichi and Maeda, Takafumi and Takiguchi, Norihito and Morita, Takeshi and Ishikawa, Mutsuo and Bornmann, Peter and Hemsel, Tobias, year=2010, pages=918–923 

@articleMracek_Hemsel_Sattel_Vasiljev_Wallaschek_2008, title=Driving concepts for bundled ultrasonic linear motors, volume=20, DOI=10.1007/s10832-007-9123-5, number=3–4, journal=Journal of Electroceramics, publisher=Springer US, author=Mracek, Maik and Hemsel, Tobias and Sattel, Thomas and Vasiljev, Piotr and Wallaschek, Jörg, year=2008, pages=153–158 

@inproceedingsHemsel_Mracek_Wallaschek_Vasiljev_2004, title=A novel approach for high power ultrasonic linear motors, volume=2, DOI=10.1109/ULTSYM.2004.1417988, number=Vol.2, booktitle=Ultrasonics Symposium, 2004 IEEE, author=Hemsel, Tobias and Mracek, Maik and Wallaschek, Jörg and Vasiljev, Piotr, year=2004, pages=1161–1164