Washington Ilyas, Houk K. N.
Department of Chemistry and Biochemistry University of California Los Angeles, CA 90095-1569 (USA).
Angew Chem Int Ed Engl. 2001 Dec 3;40(23):4485-4488. doi: 10.1002/1521-3773(20011203)40:23<4485::aid-anie4485>3.0.co;2-n.