Copp; Simonsen Journal of the Chemical Society, 1940 , p. 415,417 Full Text Show Details Horning; Horning; Platt Journal of the American Chemical Society, 1949 , vol. 71, p. 1771 Full Text View citing articles Show Details Cornubert; Maurel Bulletin de la Societe Chimique de France, 1931 , vol. <4> 49, p. 1498,1512