ALEKSIEJUK, M., J. RAABE, and J. RANACHOWSKI. “Technology and Acoustical Properties of the Ceramic High-Temperature Superconductors”. Archives of Acoustics 16, no. 3-4 (December 31, 1991): 387–412. Accessed March 4, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/1238.