JOURNAL OF MATERIALS CHEMISTRY, vol. 16, no. 47, page. 4575 - 4580, 2006-01
CHEMICAL COMMUNICATIONS, vol. 47, no. 28, page. 8022 - 8024, 2011-01
INORGANIC CHEMISTRY, vol. 45, no. 20, page. 8062 - 8069, 2006-10-02