1. V. V. Kazmiruk, I. G. Kurganov, and T. N. Savitskaya, J. Surf. Invest.: X-ray, Synchrotron Neutron Tech. 8 (6), 1240 (2014). https://doi.org/10.1134/S1027451014050073
2. M. Watanabe, H. Shinada, A. Takafuji, M. Iizuka, Y. Gunji, K. Hayakawa, and M. Takeda, US Patent No. 7030394 B2 (2006).
3. A. Yamada, US Patent No. 5 198 668 A (1993).
4. P. J. Lawson, US Patent No. 4 514 634 A (1985).
5. Y. Mochizuki and I. Kasai, JPN Patent No. 5970229 B2 (2016).