Healey; Robinson Journal of the Chemical Society, 1934 , p. 1625,1628 Full Text Show Details Mauthner Journal fuer Praktische Chemie (Leipzig), 1933 , vol. <2> 136, p. 205,209 Full Text Show Details Ballio; Schiavello Gazzetta Chimica Italiana, 1951 , vol. 81, p. 553,556,557