Von Zezschwitz, Paultheo; Petry, Frauke; De Meijere, Armin Chemistry - A European Journal, 2001, vol. 7, # 18 p. 4035 - 4046 doi: 10.1002/1521-3765(20010917)7:18<4035::AID-CHEM4035>3.0.CO;2-P