参考文献

Fraga, Braulio M.; Garcia, Victor P.; Gonzales, Antonio G.; Hernandez, Melchor G.; Hanson, James R.; Hitchcock, Peter B. Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1983 , # 11 p. 2687 - 2693