| Paper | 
|---|
| [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 |