Industrial and Engineering Chemistry, Analytical Edition, , vol. 16, p. 328 Archives of Biochemistry, , vol. 5, p. 211 Journal of the American Chemical Society, , vol. 64, p. 1856,1859 Journal of the American Chemical Society, , vol. 66, p. 186,190 Journal of the American Chemical Society, , vol. 66, p. 137,142, 143