Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), , p. 744 - 749

Journal of the Chemical Society, Chemical Communications, , # 11 p. 627 - 629

Butler, Richard N.; Gillan, Ann M.; James, John P.; Evans, Ann M.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1989 , p. 159 - 163

Butler, Richard N.; James, John P.
Journal of the Chemical Society, Chemical Communications, 1983 , # 11 p. 627 - 629