Sacks; Aston Journal of the American Chemical Society, 1951 , vol. 73, p. 3902,3904 Full Text Show Details Scott; Heller Journal of Organic Chemistry, 1955 , vol. 20, p. 1159,1161 Full Text Show Details Ecke et al. Journal of the American Chemical Society, 1950 , vol. 72, p. 1511