Osterkamp, Frank; Ziemer, Burkhard; Koert, Ulrich; Wiesner, Matthias; Raddatz, Peter; Goodman, Simon L. Chemistry - A European Journal, 2000, vol. 6, # 4 p. 666 - 683 doi: 10.1002/(SICI)1521-3765(20000218)6:4<666::AID-CHEM666>3.0.CO;2-Z