Gilman; Esmay Journal of the American Chemical Society, 1953 , vol. 75, p. 278,280 Full Text Show Details Koebrich Chemische Berichte, 1959 , vol. 92, p. 2981,2984 Full Text Show Details Truce; Amos Journal of the American Chemical Society, 1951 , vol. 73, p. 3013,3016