Naoki Kuramoto, Shigeki Mizushima, Lulu Zhang, Kazuaki Fujita, Yasushi Azuma, Akira Kurokawa, Sho Okubo, Hajime Inaba, Kenichi Fujii. Determination of the Avogadro constant by the XRCD method using a Si-28-enriched sphere. METROLOGIA. 2017. 54. 5. 716-729
G. Bartl, P. Becker, B. Beckhoff, H. Bettin, E. Beyer, M. Borys, I. Busch, L. Cibik, G. D'Agostino, E. Darlatt, et al. A new Si-28 single crystal: counting the atoms for the new kilogram definition. METROLOGIA. 2017. 54. 5. 693-715