参考文献

Takahashi, Chika; Mikamiyama, Hidenori; Akiyama, Toshiyuki; Tomita, Kenji; Taoda, Yoshiyuki; Kawai, Makoto; Anan, Kosuke; Miyagawa, Masayoshi; Suzuki, Naoyuki Patent: US2013/197219 A1, 2013 ;