参考文献

MIYAKE, HIROSHI; TAKE, KAZUHIKO; SHIGENAGA, SHINJI; AZAMI, HIDENORI; SASAKI, HIROSHI; EIKYU, YOSHITERU; NAKAI, KAZUO; ISHIDA, JUNYA; MANABE, TAKASHI; KONISHI, NOBUKIYO; TERASAKA, TADASHI Patent: US2003/114668 A1, 2003 ;