1. 1) Y. Kawamura: Alutopia (8) (2012) 9–13 (in Japanese).
2. 2) The Japan Magnesium Association: Genba de ikasu kinzokuzairyou siriizu Magnesium, (Maruzen Publishing, Tokyo, 2011) p. 33 (in Japanese).
3. 3) H. Watanabe, N. Ikeo and T. Mukai: J. JILM 66 (2016) 318–323 (in Japanese).
4. 4) I. Murakami, A. Tanaka and K. Higashimura: Alutopia (10) (2012) 33–37 (in Japanese).
5. 5) M. Sakamoto, S. Akiyama, T. Hagio and K. Ogi: J. JFS 69 (1997) 227–233 (in Japanese).