Fleming, Ian; Pearce, Andrew
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1980 , p. 2485 - 2489
Lee, Minyung; Haseltine, John N.; Smith, Amos B.; Hochstrasser, Robin M.
Journal of the American Chemical Society, 1989 , vol. 111, # 14 p. 5044 - 5051