Driving concepts for bundled ultrasonic linear motors
M. Mracek, T. Hemsel, T. Sattel, P. Vasiljev, J. Wallaschek, Journal of Electroceramics 20 (2008) 153–158.

Tactile tissue characterisation by piezoelectric systems
R. Stroop, D.O. Uribe, M.O. Martinez, M. Brökelmann, T. Hemsel, J. Wallaschek, Journal of Electroceramics 20 (2008) 237–241.

Fundamental experiments as benchmark problems for modeling ultrasonic micro-impact processes
J. Twiefel, C. Potthast, M. Mracek, T. Hemsel, T. Sattel, J. Wallaschek, Journal of Electroceramics 20 (2008) 209–214.