Pfundheller, Henrik M.; Bryld, Torsten; Olsen, Carl E.; Wengel, Jesper Helvetica Chimica Acta, 2000, vol. 83, # 1 p. 128 - 151 doi: 10.1002/(SICI)1522-2675(20000119)83:1<128::AID-HLCA128>3.0.CO;2-Q