ALEKSIEJUK, M., RAABE, J. and RANACHOWSKI, J. (1991) “Technology and acoustical properties of the ceramic high-temperature superconductors”, Archives of Acoustics, 16(3-4), pp. 387–412. Available at: https://acoustics.ippt.gov.pl/index.php/aa/article/view/1238 (Accessed: 4 March 2026).