1. 1) I. Ohnaka: J. JFS 78 (2006) 602–608.
2. 2) Y. Otsuka: J. JFS 78 (2006) 609–614.
3. 3) Y. Maeda and H. Nomura: J. JFS 78 (2006) 654–660.
4. 4) Y. Takagi, K. Yano and J. Ogura, Die and Mould Technology 34(5) (2019) 40–43.
5. 5) K. Tsukuda, J. Kubo and Y. Maeda: Report of the 171th JFS Meeting, (2018) p. 38.