Barnett; Lawrence Journal of the Chemical Society, 1935 , p. 1104,1106 Full Text Show Details Gruber; Adams Journal of the American Chemical Society, 1935 , vol. 57, p. 2555 Full Text View citing articles Show Details Quadrat-i-Khuda; Ray Journal of the Indian Chemical Society, 1939 , vol. 16, p. 525,531 Full Text Show Details Backer; Strating; Huisman Recueil des Travaux Chimiques des Pays-Bas, 1941 , vol. 60, p. 381,384 Full Text Show Details Musante Gazzetta Chimica Italiana, 1942 , vol. 72, p. 496,499