参考文献

Kwon, Heon-Yong; Maggiarosa, Nicola; Lee, Ki-Soo; Cho, Min-Seok; Park, Jong-Sang; Cho, Joon-Hee; Lee, Yong-Ho; Lee, Byung-Ryul; Kim, Seon-Kyoung; Hong, Dae-Sik Patent: US2010/256315 A1, 2010 ;