参考文献

Ho, Yu-Man; Koo, Chi-Kin; Wong, Ka-Leung; Kong, Hoi-Kuan; Chan, Chris Tsz-Leung; Kwok, Wai-Ming; Chow, Cheuk-Fai; Lam, Michael Hon-Wah; Wong, Wai-Yeung Dalton Transactions, 2012 , vol. 41, # 6 p. 1792 - 1800