1. G. Dresselhaus, A.F. Kip and C. Kittel, Phys.Rev. 92, 827 (1953)
2. K. Suzuki and J.C. Hensel, Phys.Rev. B9, 4184 (1974)
3. J.C. Hensel and K. Suzuki, Phys.Rev. B9, 4219 (1974)
4. see, for references, Yu.V. Kosichkin: “Optical Properties of Tellurium Under High Pressure”, in The Physics of Selenium and Tellurium, Proc. Int. Conf., Königstein, F.R. Germany, May 28–131,1979, ed. by E. Gerlach, P. Grosse, Springer Series in Solid-State Sciences, Vol. 13 (Springer, Berlin, Heidelberg, New York 1979) p.96
5. K.H. Hermann, J.Phys. Chem. 230, 123 (1965)