Kang, Suk-Ku; Kim, Sung-Gyu; Park, Dong-Chul; Lee, Jang-Sup; Yoo, Weon-Jong; Pak, Chwan Siek Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1993, # 1 p. 9 - 10