Amir-Ebrahimi, Valia, Hamilton, James G., Nelson, Jane, Rooney, John J., Thompson, Jillian M., Beaumont, Andrew J., Rooney, A. Denise and Harding, Charles J. (1999) First evidence for radical anions in metathesis catalysis. Chemical Communications, 17. pp. 1621-1622. ISSN 1359-7345