Journal of Zhejiang University-SCIENCE A
Journal of Zhejiang University-SCIENCE A > 2006 > 7 > 2 > 330-334
Journal of Zhejiang University-SCIENCE A > 2008 > 9 > 11 > 1614-1620
Journal of Zhejiang University-SCIENCE A > 2006 > 7 > 2 > 330-334
Journal of Zhejiang University-SCIENCE A > 2008 > 9 > 11 > 1614-1620