| Paper | 
|---|
| [1999] Synthesis and Mechanical/Magnetic Properties of Nano-Grained Iron-Oxides Prepared by Inert-Gas Condensation and Pulse Electric Current Sintering Process Yong-Ho Choa, Tatachika Nakayama, Tohru Sekino and Koichi Niihara Metals and Materials International, 5 (1999), 135-39 | 
| [1999] Yong-Ho Choa, Manwar Hussain, Koichi Niihara Materials Integration, 12 (1999), 61-65 | 
| [1999] Yong-Ho Choa, H. Hayashi, T. Sekino, K.  Niihara Key engineering materials 161-163 (1999), 293-96 | 
| [1999] Yong-Ho Choa, Noriko Bamba, Hiroyuki Hayashi, Hiroki Kondo, Tohru Sekino, Koichi Niihara Journal of Materials Science, 34 (1999), 3789-93 | 
| [1999] Nakahira atsushi, murao toshihiro, takeda shin"ichi, tajika masahiko, sekino tooru, niihara koichi, Yong-Ho Choa Journal of Ceramic Society Japan, 107 (1999), p.460 | 
| [1998] Yong-Ho Choa, Nakahira A,  Niihara K Science and Engineering of Composite Materials. 7 (1998), P.249–258 | 
| [1998] Masashi Yoshimura, Tatsuki Ohji, Mutsuo Sando, Yong-Ho Choa, Tohru Sekino, and Koichi Niihara Materials Letters, 35 (1998), p.139-43 | 
| [1998] Jian-Feng Yang, Yong-Ho Choa, Jitendra P. Singh, and Koichi Niihara Journal of the Ceramic Society of Japan, 106 (1998), p.951-57 | 
| [1998] Jian-Feng Yang, Yong-Ho Choa, Tohru Sekino, and Koichi Niihara Journal of the Japan Society of Powder and Powder Metallurgy, 45 (1998), p.1172-77 | 
| [1998] Tatsuki Ohji, Young-Keun Jeong, Yong-Ho Choa, and Koichi Niihara Journal of the American Ceramic Society, 81 (1998), p.1453-60 | 
| [1998] Koichi Niihara, Shoji Kosaka, Tohru Sekino, and Yong-Hong Choa Fine ceramics, 27 (1998), p.27-28 | 
| [1998] Tadachika Nakayama, Yong-Ho Choa, Takao A. Yamamoto, and Koichi Niihara Japan Powder and Powder Materials, 45 (1998), p.1207-10 | 
| [1998] Noriko Bamba, Yong-Ho Choa, Tohru Sekino, Koichi Niihara Journal of the European Ceramic Society, 18 (1998), p.693-99 | 
| [1998] Noriko Bamba, Yong-Ho Choa, Tohru Sekino, and Koichi Niihara Solid State Ionics, 111 (1998), p.171-79 | 
| [1997] Tsuyoshi Yoshida, Atsushi Nakahira, Kazunori Kijima, Yong-Ho Choa and Koichi Niihara Japan Powder & Powder Materials vol. 44, no. 12 pp.1078-1082 |