1. Q.G. Sheng, B.R. Cooper, and S.P. Lim, Phys. Rev. B 50, 9215 (1994).
2. Q.G. Sheng and B.R. Cooper, Phys. Rev. B 50, 965 (1994).
3. J. Schoenes, O. Vogt, J. Löhle, F. Hulliger, and K. Mattenberger, Phys. Rev. B 53, 14,987 (1996); F. Bourdarot, P. Burlet, R. Calemczuk, F. Lapierre, K. Mattenberger, and O. Vogt, J. de Actinides, Dijon, France, April, 1997.
4. Q.G. Sheng and B.R. Cooper, Phil. Mag. Lett. 72, 123 (1995).
5. Q.G. Sheng and B.R. Cooper, J. Magn. Magn. Mater. 164 335 (1996).