Journal of the American Chemical Society, , vol. 73, p. 497,499







Journal of Organic Chemistry, , vol. 16, p. 447,451







Helvetica Chimica Acta, , vol. 33, p. 1730,1740







Journal of the American Chemical Society, , vol. 69, p. 302,303
Journal of the American Chemical Society, , vol. 73, p. 497