ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, vol. 55, page. 108 - 110, 1999-01-15
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, vol. 38, no. 18, page. 2756 - 2759, 1999-01
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, no. 6, page. 923 - 929, 1999-03-21
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 124, no. 19, page. 5374 - 5379, 2002-05-15