@inproceedingsLittmann_Hemsel_Wallaschek_2004, title=Design criteria for piezoelectric transformers, volume=4, booktitle=Proceedings of the 18th International Congress on Acoustics, author=Littmann, Walter and Hemsel, Tobias and Wallaschek, Jörg, year=2004, pages=2889–2892 

@inproceedingsMracek_Wallaschek_Hemsel_2004, title=Self configuration of miniature ultrasonic linear motors, booktitle=Proceedings of the 18th International Congress on Acoustics, author=Mracek, Maik and Wallaschek, Jörg and Hemsel, Tobias, year=2004, pages=417–420 

@inproceedingsFu_Hemsel_Wallaschek_2004, title=Model-based Diagnosis for Sandwiched Ultrasonic Transducers, booktitle=Proceedings of the 18th International Congress on Acoustics, ICA, author=Fu, Bo and Hemsel, Tobias and Wallaschek, Jörg, year=2004, pages=4–9 

@inproceedingsHemsel_Wallaschek_2003, title=Modelling and Analysis of Piezoelectric Transformers, booktitle=Proceedings of the 5th International Congress of Intelligent Materials (ICIM), author=Hemsel, Tobias and Wallaschek, Jörg, year=2003 

@inproceedingsLittmann_Hemsel_Kauczor_Wallaschek_Sinha_2003, title=Load-adaptive phase-controller for resonant driven piezoelectric devices, booktitle=Proceedings of World Congress Ultrasonics, author=Littmann, Walter and Hemsel, Tobias and Kauczor, Christopher and Wallaschek, Jörg and Sinha, W, year=2003, pages=547–550 

@inproceedingsHemsel_Littmann_Wallaschek_2002, title=Piezoelectric transformers - state of the art and development trends, volume=1, DOI=10.1109/ULTSYM.2002.1193485, number=vol.1, booktitle=Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE, author=Hemsel, Tobias and Littmann, Walter and Wallaschek, Jörg, year=2002, pages=645–648 

@inproceedingsHemsel_Littmann_Wallaschek_2002, title=Piezoelektrische Transformatoren - Bauformen und Modellierung, booktitle=47. Internationales Wissenschaftliches Kolloquium, author=Hemsel, Tobias and Littmann, Walter and Wallaschek, Jörg, year=2002 

@bookHemsel_2001, place=Paderborn, title=Untersuchung und Weiterentwicklung linearer piezoelektrischer Schwingungsantriebe, volume=101, publisher=Verlagsschriftenreihe des Heinz Nixdorf Instituts, author=Hemsel, Tobias, year=2001 

@inproceedingsWallaschek_Hemsel_2001, series=VDI-Z/Konstruktion, title=Piezoelektrische lineare Schwingungsantriebe, booktitle=Special Antriebstechnik, author=Wallaschek, Jörg and Hemsel, Tobias, year=2001, pages=70–71, collection=VDI-Z/Konstruktion 

@articleHemsel_Wallaschek_2000, title=Survey of the present state of the art of piezoelectric linear motors, volume=38, DOI=10.1016/S0041-624X(99)00143-2, journal=Ultrasonics, author=Hemsel, Tobias and Wallaschek, Jörg, year=2000, pages=37–40 

@inproceedingsHemsel_Wallaschek_2000, title=State of the art and development trends of ultrasonic linear motors, volume=1, DOI=10.1109/ULTSYM.2000.922635, booktitle=Ultrasonics Symposium, 2000 IEEE, author=Hemsel, Tobias and Wallaschek, Jörg, year=2000, pages=663–666 vol.1 

@inproceedingsHemsel_Wallaschek_2000, place=Bremen, title=Piezoelectic linear motors, booktitle=Tagungsband der ACTUATOR, author=Hemsel, Tobias and Wallaschek, Jörg, year=2000, pages=250–253 

@articleHemsel_Wallaschek_2000, place=D\'22usseldorf, series=VDI-Bericht, title=Stand der Technik und Entwicklungsperspektiven linearer piezoelektrischer Schwingungsantriebe, volume=1533, author=Hemsel, Tobias and Wallaschek, Jörg, year=2000, pages=147–166, collection=VDI-Bericht 

@inproceedingsHemsel_Krome_Littmann_Wallaschek_1998, place=Ilmenau, Deutschland, title=Modellierung piezoelektrischer Stapel- und Vielschichtaktoren für dynamischen Betrieb, booktitle=Proceedings 2. Polnisch-Deutscher Workshop “Werkzeuge der Mechatronik”, author=Hemsel, Tobias and Krome, Jürgen and Littmann, Walter and Wallaschek, Jörg, year=1998 

@inproceedingsHemsel_Wallaschek_1998, title=A piezoelectric linear vibration drive for high driving forces, number=1, booktitle=Proceedings of VIBROENGINEERING, author=Hemsel, Tobias and Wallaschek, Jörg, year=1998, pages=7–12 

@inproceedingsGoldschmidt_Hemsel_Krome_Storck_Wallaschek_1997, place=Waldbronn, Deutschland, title=Schwingungsprüfstand zur vollautomatischen Messung von Ultraschallschwingungen in piezoelektrischen Antrieben, booktitle=Tagungsband zum 4. Laser Vibrometer Seminar der Polytec GmbH, author=Goldschmidt, Stefan and Hemsel, Tobias and Krome, Jürgen and Storck, Heiner and Wallaschek, Jörg, year=1997 

@inproceedingsHemsel_Wallaschek_1997, place=Florenz, Italien, title=Ultrasonic motors for linear positioning tasks in automobiles, booktitle=Proceedings of the 30th International Symposium on Automotive Technology \'26; Automation (ISATA), author=Hemsel, Tobias and Wallaschek, Jörg, year=1997, pages=631–637 

@inproceedingsHemsel_Wallaschek_1997, place=Duisburg, title=Piezoelectric ultrasonic linear motors, number=370, booktitle=EUROMECH, European Mechanics Colloquium “Synthesis of Mechatronic Sytems”, author=Hemsel, Tobias and Wallaschek, Jörg, year=1997