Lampe, Thomas F. J.; Weitz-Schmidt, Gabriele; Wong, Chi-Huey Angewandte Chemie - International Edition, 1998, vol. 37, # 12 p. 1707 - 1711 doi: 10.1002/(SICI)1521-3773(19980703)37:12<1707::AID-ANIE1707>3.0.CO;2-V