1. Herring, C. (1966) Exchange interactions among itinerant electrons, in G.T. Rado and H. Suhl (eds.), Magnetism, Academic Press, New York and London, Vol. IV, p. 290.
2. Fay, D. and Appel, J. (1979) Phonon contribution to the Stoner enhancement factor: Ferromagnetism and possible superconductivity of ZrZn2
Phys. Rev.
B20 3705–3708;
3. Fay, D. and Appel, J. (1980) Comment on the isotope effect in weak itinerant ferro-magnets, Phys. Rev.
B22 1461–1463.
4. Hopfield, J.J. (1968) The isotope effect in very weak itinerant ferromagnets, Phys. Lett.
A27 397–399.
5. Edwards, D.M. and Wohlfarth, E.P. (1968) Magnetic isotherms in the band model of ferromagnetism, Proc. Roy. Soc. London, A303 127–137.