Ma Bao-Qing, Gao Song, Su Gang, Xu Guang-Xian
State Key Laboratory of Rare Earth Materials Chemistry and Applications PKU-HKU Joint Laboratory on Rare Earth Materials and Bioinorganic Chemistry Peking University, Beijing 100871 (P. R. China).
Angew Chem Int Ed Engl. 2001 Jan 19;40(2):434-437.