Appleton, David C.; Bull, David C.; Givens, Richard S.; Lillis, Veronica; Kenna, James Mc; et al.
Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 1980 , p. 77 - 82
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Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 1980 , p. 87 - 90