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Alternative author names: Kentaro Takagi.
- 2014 -- Kentaro Takagi, Gou Nishida, Bernhard Maschke, Kinji Asaka
- 2011 -- Gou Nishida, Kentaro Takagi, Bernhard Maschke, Takaaki Osada
- 2009 -- Kentaro Takagi, Kinji Asaka, Gou Nishida, Yoshihiro Nakabo, Zhi Wei Luo
- 2008 -- Gou Nishida, Kentaro Takagi, Bernhard Maschke, Zhi-wei Luo