1. A. Aharoni, Introduction to the Theory of Ferromagnetism, 2nd edn. (Oxford University Press, Oxford, 2000).
2. A.H. Cottrell, Introduction to the Modern Theory of Metals (The Institute of Metals, London, 1988).
3. R.M. Martin, Electronic Structure (Cambridge University Press, Cambridge, 2004).
4. L. Pauling, The Nature of the Chemical Bond, 3rd edn. (Cornell University Press, Ithaca, New York, 1960).
5. P. Wilkes, Solid State Theory in Metallurgy (Cambridge University Press, Cambridge, 1973).