Clive, Derrick L. J.; Khodabocus, Ahmad; Vernon, Peter G.; Angoh, A. Gaetan; Bordeleau, Luc; et al.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1991 , # 6 p. 1433 - 1444

Giles, Robin G. F.; Hughes, Andrew B.; Sargent, Melvyn V.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1991 , # 6 p. 1581 - 1587