@articlePanning_Sextro_Popp_2003, title=Spatial dynamics of tuned and mistuned bladed disks with cylindrical and wedge-shaped friction dampers, volume=9, number=3, journal=International Journal of Rotating Machinery, publisher=Hindawi Publishing Corporation, author=Panning, Lars and Sextro, Walter and Popp, Karl, year=2003, pages=219–228 

@articlePopp_Panning_Sextro_2003, title=Vibration Damping by Friction Forces -Theory and Applications, volume=9, journal=Journal of Vibration and Control, author=Popp, Karl and Panning, Lars and Sextro, Walter, year=2003, pages=419–448 

@inproceedingsSextro_Popp_2003, place=Frankfurt am Main, Germany, title=Optimierung des Schwingungsverhaltens elastischer Strukturen mit Reibfugen am Beispiel von Turbomaschinenschaufeln, number=753, booktitle=Forschungsvereinigung Verbrennungskraftmaschinen (FW), author=Sextro, Walter and Popp, Karl, year=2003, pages=40 

@inproceedingsSzwedowicz_Sextro_Visser_Masserey_2003, place=Atlanta, Georgia, USA, title=On forced vibration of shrouded turbine blades, DOI=doi:10.1115/GT2003-38808, number=-38808, booktitle=ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference, author=Szwedowicz, J and Sextro, Walter and Visser, R and Masserey, P.A, year=2003 

@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 

@inproceedingsPanning_Sextro_Popp_2002, place=Amsterdam, Niederlande, title=Optimization of the Contact Geometry between Turbine Blades and Underplatform Dampers with respect to Friction Damping, number=GT-2002-30429, booktitle=Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air, author=Panning, Lars and Sextro, Walter and Popp, Karl, year=2002 

@inproceedingsPanning_Sextro_Popp_2002, place=Honolulu, Hawaii, USA, title=Spatial dynamics of tuned and mistuned bladed disks with cylindrical and wedge-shaped friction dampers, booktitle=Proceedings of the 9th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC, author=Panning, Lars and Sextro, Walter and Popp, Karl, year=2002 

@inproceedingsSextro_Panning_Götting_2002, place=Amsterdam, Niederlande, title=Fast Calculation of the Statistics of the Forced Response of Mistuned Bladed Disk Assemblies with Friction Contacts, number=GT-2002-30427, booktitle=Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air, author=Sextro, Walter and Panning, Lars and Götting, Florian, year=2002 

@inproceedingsSextro_Popp_2002, place=Frankfurt am Main, Germany, title=Optimierung des Schwingungsverhaltens elastischer Strukturen mit Reibfugen, number=518, booktitle=Forschungsvereinigung Verbrennungskraftmaschinen (FW) - lnformationstagung Turbinen, author=Sextro, Walter and Popp, Karl, year=2002, pages=157–183 

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

@inproceedingsPanning_Sextro_Popp_2001, title=Schwingungsanalyse verstimmter Schaufelkränze mit Reibelementen, booktitle=Schwingungen in rotierenden Maschinen VI SIRM, Referate der Tagung in Wien, publisher=Vieweg-Verlag, author=Panning, Lars and Sextro, Walter and Popp, Karl, editor=Irretier, H and Nordmann, R and Springer, HEditors, year=2001, pages=297–306 

@articleSextro_2001, title=Heat and Wear Generation for Rolling Contacts, volume=81, journal=Zeitschrift für angewandte Mathematik und Mechanik (ZAMM), author=Sextro, Walter, year=2001, pages=225–226 

@inproceedingsSextro_2001, place=Pittsburgh, Pennsylvania, USA, title=Development and Experimental Validation of a Point Contact Model for Dynamical Problems with Friction, number=DE/VIB-21512, booktitle=ASME Design Engineering Technical Conferences, author=Sextro, Walter, year=2001, pages=1–12 

@articleSextro_Popp_Krzyzynski_2001, title=Localization in Nonlinear Mistuned Systems with Cyclic Symmetry, volume=25, DOI=10.1023/A:1012915002568, number=1–3, journal=Nonlinear Dynamics, publisher=Kluwer Academic Publishers, author=Sextro, Walter and Popp, Karl and Krzyzynski, Tomasz, year=2001, pages=207–220 

@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