1. Doniach, S. (1977) The Kondo lattice and weak antiferromagnetism, Physica B91,231–234.
2. Moriya, T. and Takimoto, T. (1995) Anomalous properties around magnetic instability in Heavy electron systems, J. Phys. Soc. Jpn. 64,960–969.
3. Steglich, F., Geibel, C., Modler, R., Lang, M., Hellmann, P., and Gegenwart, P. (1995) Classification of strongly correlated f - electrons systems, J. Low Temp. Phys. 99,267–281.
4. Nozieres, P. (1985) Magnetic impurities and Kondo effect,Ann. Phys. (Paris) 10,19–35.
5. Jones, B.A. and Varma, C.M. (1989) Critical point in the solution of the magnetic impurity problem, Phys. Rev. B40,324–329.