Volume 18, Issue 11 (November 2006)
By Yuanqing Li, Cuntai Guan
Volume 25, Issue 8 (August 2013)
By Mahnaz Arvaneh, Cuntai Guan, Kai Keng Ang, Chai Quek
Volume 25, Issue 10 (October 2013)
By Xinyang Li, Haihong Zhang, Cuntai Guan, Sim Heng Ong, Kai Keng Ang, Yaozhang Pan