Usui, Satoshi; Tsuboya, Shoko; Umezawa, Yukthiro; Hazama, Ken; Okamura, Mutsuo
Bulletin of the Chemical Society of Japan, 2009 , vol. 82, # 2 p. 254 - 260
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