Masjost, Birgit; Ballmer, Patrick; Borroni, Edilio; Zuercher, Gerhard; Winkler, Fritz K.; Jakob-Roetne, Roland; Diederich, Francois Chemistry - A European Journal, 2000, vol. 6, # 6 p. 971 - 982 doi: 10.1002/(SICI)1521-3765(20000317)6:6<971::AID-CHEM971>3.0.CO;2-0