McMahon, Robert J.; Chapman, Orville L.; Hayes, Richard A.; Hess, Thomas C.; Krimmer, Hans-Peter
Journal of the American Chemical Society, 1985 , vol. 107, # 25 p. 7597 - 7606
Katritzky, Alan R.; Marson, Charles M.; Thind, Sukhpal S.; Ellison, Joan
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1983 , p. 487 - 496