Smith; Lund Journal of the American Chemical Society, 1930 , vol. 52, p. 4144,4147 Full Text Show Details Kohlrausch; Pongratz Monatshefte fuer Chemie, 1934 , vol. 64, p. 361,364, 365 Monatshefte fuer Chemie, 1935 , vol. 65, p. 6,14