Hutter, Daniel; Blaettler, Monika O.; Benner, Steven A. Helvetica Chimica Acta, 2002, vol. 85, # 9 p. 2777 - 2806 doi: 10.1002/1522-2675(200209)85:9<2777::AID-HLCA2777>3.0.CO;2-1