FILIPIAK, J., MAJCHROWSKI, A. and ŁUKASIEWICZ, T. (1994) “Lithium tetraborate single crystals as a substrate for SAW devices”, Archives of Acoustics, 19(1), pp. 131–135. Available at: http://acoustics.ippt.gov.pl/index.php/aa/article/view/1067 (Accessed: 18 April 2026).