Carpenter,W. et al.
Journal of the American Chemical Society, 1967 , vol. 89, p. 6167 - 6170

Hall, David G.; Gupta, Chakra; Morton, Thomas Hellman
Journal of the American Chemical Society, 1981 , vol. 103, # 9 p. 2416 - 2417

Dulayymi, Juma'a R. Al; Baird, Mark S.; Bolesov, Ivan G.; Nizovtsev, Alexey V.; Tverezovsky, Viacheslav V.
Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 2000 , # 7 p. 1603 - 1618