Angelos Sarah, Yang Ying-Wei, Patel Kaushik, Stoddart J Fraser, Zink Jeffrey I
California NanoSystems Institute and Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095-1569, USA.
Angew Chem Int Ed Engl. 2008;47(12):2222-6. doi: 10.1002/anie.200705211.