1. 1) Okuno O, Ishikawa S, Iimuro FT, Kinouchi Y, Yamada H, Nakano T, Hamanaka H, Ishihata N, Mizutani H, Ai M. Development of sealed cup yoke type dental magnetic attachment. Dent Mater J 1991; 10: 172-184.
2. 2) Hosoi T, Ohkubo C, Takada Y, Okuno O, Nakamura Y, Tanaka Y, Ishigami T, Umekawa Y, Kikuchi A, Kinouchi Y, Mizutani H. Foreign dental magnetic attachments. J J Mag Dent 2008; 17: 89-102.
3. 3) Tegawa Y, Kinouchi Y. Approximation of gap-force characteristics for dental magnetic attachments. J J Dent Mater 2003; 12: 29-33.
4. 4) Tegawa Y, Kinouchi Y. Expression of gap-magnetic force characteristics of magnetic attachments. J J Mag Dent 2003; 12: 33-39.
5. 5) Terao Y, Nakamura Y, Ishida T, Ando A, Nakamura H, Kumano H, Shoji K, Tanaka Y. Measuring methods of the attractive force of magnetic attachment. J J Mag Dent 2007; 16: 14-19.