Baenteli, Rolf; Herold, Peter; Bruns, Christian; Patton, John T.; Magnani, John L.; Thoma, Gebhard Helvetica Chimica Acta, 2000, vol. 83, # 11 p. 2893 - 2907 doi: 10.1002/1522-2675(20001108)83:11<2893::AID-HLCA2893>3.0.CO;2-G