DANICKI, E., and W. LAPRUS. “Piezoelectric Interfacial Waves in Langasite and Dilithium Tetraborate”. Archives of Acoustics 21, no. 1 (January 1, 2014): 99–107. Accessed August 21, 2025. https://acoustics.ippt.pan.pl/index.php/aa/article/view/981.