BŁACHOWICZ, T., and Z. KLESZCZEWSKI. “Observation of Hypersonic Acoustics Waves in a LiTaO3 Crystal”. Archives of Acoustics 22, no. 3 (September 30, 1997): 351–358. Accessed April 19, 2026. http://acoustics.ippt.gov.pl/index.php/aa/article/view/960.