Hill; Melhuish Journal of the Chemical Society, 1935 , p. 1161,1164 Full Text Show Details Karrer et al. Helvetica Chimica Acta, 1943 , vol. 26, p. 2116,2118 Full Text Show Details Reichel; Doering Justus Liebigs Annalen der Chemie, 1957 , vol. 606, p. 137,145