Maughan Michael A T, Davies Ieuan G, Claridge Timothy D W, Courtney Steve, Hay Phil, Davis Benjamin G
Department of Chemistry, University of Durham, South Road, Durham, DH1 3LE, UK.
Angew Chem Int Ed Engl. 2003 Aug 18;42(32):3788-92. doi: 10.1002/anie.200351002.