Stawrowskaja Zhurnal Obshchei Khimii, 1955 , vol. 25, p. 331,335; engl. Ausg. S. 313, 316 Full Text Show Details Burckhalter et al. Journal of the American Chemical Society, 1948 , vol. 70, p. 1363,1372 Journal of the American Chemical Society, 1950 , vol. 72, p. 1024