Smeaton, M. D., R. C. Hughes, J. Vrba, and R. R. Haering. “Nanosecond Acoustic Strain Pulses from CdS Phonon Masers”. Canadian Acoustics 4, no. 2 (April 1, 1976): 30–35. Accessed October 4, 2024. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/390.