Katritzky, Alan R.; Lopez-Rodriguez, Maria L.; Marquet, Jorge
Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 1984 , # 3 p. 349 - 354
Cooper, Catherine N.; Jenner, Peter J.; Perry, Nigel B.; Russel-King, Jonquil; Storesund, Hans J.; Whiting, Mark C.
Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 1982 , p. 605 - 612