1. (a) G. F. Druce, Rhenium, Cambridge University Press: Cambridge, 1948, gives an account that is complete through the date of publication, including a complete bibliography; (b) F. Habashi, CIM Bulletin 1985, 78, pp 90–91; (c) See also M. E. Weeks and H. M. Leicester, The Discovery of the Elements 7th Edn., Journal of Chemical Education, 1968, pp. 823–829 for early references; (d) R. Colton, The Chemistry of Rhenium and Technetium, John Wiley and Sons, N.Y., 1965.
2. W. Geilmann, F. W. Wrigge and W. Blitz, Z. anorg. allg. Chem. 1933, 214, 248.
3. H. Hagen and A. Sieverts, Z. anorg. allg. Chem. 1935, 215, 111.
4. W. Geilmann and F. W. Wrigge, Z. anorg. allg. Chem. 1935, 233, 144.
5. J. E. Fergusson, W. Kirkham and R. S. Nyholm, in Rhenium B. W. Gonser, Ed., Elsevier, N.Y., 1962, pp. 36.