參考文獻:
Cuffini, Silvia Christopher, Glidewell Low, John N. De Oliveira, Aline G. De Souza, Marcus V. N. Vasconcelos, Thatyana R. A. Wardell, Solange M. S. V. Wardell, James L. Acta Crystallographica Section B: Structural Science, 2006 , vol. 62, # 4 p. 651 - 665