参考文献

KYOTO UNIVERSITY; Kakeya, Hideaki; Hattori, Akira; Takasu, Yasuaki; Fujii, Nobutaka; Oishi, Shinya; Kojima, Soichi; Hara, Mitsuko Patent: US2013/45977 A1, 2013 ; Location in patent: Paragraph 0219; 0220; 0221; 0222 ;