1. 1) Y. Matsui: The 179th Nishiyama Memorial Seminar, ISIJ, Tokyo, (2003), 171.
2. 2) Y. Matsui: The 1st Workshop of the Future of the Iron-making Process of High Temperature Process Sectional Meeting in Iron-manufacturing Forum, ISIJ, Tokyo, (2013), 1.
3. 3) Y. Matsui: The 39th Matoba Memmorial Seminar, Tohoku University, Sendai, (2013), 1.
4. 4) K. Tawara, T. Mitsuru and Study Group of Iron Sand Refining Method from Ancient Times: Fukkoku Kaisetsu-Ban Korai no Satetsu Seirenhou, Tatara Suiseitetuhou, Keiyuu-Sha, Tokyo, (2007), 1.
5. 5) K. Nagata: Met. Technol. (Jpn.), 77 (2007), 1, 83.