Cotterill, Ian C.; Jaouhari, Rabih; Dorman, Gyoergy; Roberts, Stanley M.; Scheinmann, Feodor; Wakefield, Basil J.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1991 , # 10 p. 2505 - 2512