Rothstein; Saboor Journal of the Chemical Society, 1943 , p. 425,428 Full Text Show Details Clemo; Dickenson Journal of the Chemical Society, 1937 , p. 255 Full Text Show Details Sengupta Journal fuer Praktische Chemie (Leipzig), 1938 , vol. <2> 151, p. 82,93 Full Text Show Details Desai; Wali Proceedings - Indian Academy of Sciences, Section A, 1937 , vol. 6, p. 135,142