Betts Helen M, Barnard Peter J, Bayly Simon R, Dilworth Jonathan R, Gee Antony D, Holland Jason P
Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK.
Angew Chem Int Ed Engl. 2008;47(44):8416-9. doi: 10.1002/anie.200801936.