参考文献:
Lewis, Frederick D. Bassani, Dario M. Burch, Eric L. Cohen, Bliss E. Engleman, Jeffrey A. Reddy, G. Dasharatha Schneider, Siegfried Jaeger, Wighard Gedeck, Peter Gahr, Michael Journal of the American Chemical Society, 995 , vol. 7, # 2 p. 66 - 669