Kruaehong, T., W. Chaiphaksa, J. Kaewkhao, S. Sujinnapram, and P. Udomsamuthirun. “The Mass Attenuation Coefficients and Effective Atomic Numbers of Y-Based Superconductors in Energy Range 220 KeV to 662 KeV”. Journal of Materials Science and Applied Energy, vol. 8, no. 2, Aug. 2019, pp. 389-97, https://ph01.tci-thaijo.org/index.php/jmsae_ceae/article/view/195935.