1. Dehnung von Zink-Kristallen unter Ultraschalleinwirkung
2. “The Use of High-Intensity Ultrasonics,”;Puskar,1982
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4. P. Trimmel, W. Kromp and N. Claussen, Ultrasonic International 79 Conference Proceedings, Science and Technology Press, Guildford, Surrey, GB (1979), p. 562.
5. Hysteresis loop of an elastic-plastic λ/2 oscillator