Portius Peter, Filippou Alexander C, Schnakenburg Gregor, Davis Martin, Wehrstedt Klaus-Dieter
Department of Chemistry, The University of Sheffield, Brook Hill, Sheffield, S3 7HF UK.
Angew Chem Int Ed Engl. 2010 Oct 18;49(43):8013-6. doi: 10.1002/anie.201001826.