1. G. Grosso and G. Pastori Parravicini, Solid State Physics, 2
$$^{\rm nd}$$
Edition, (Academic Press, 2013).
2. J.F. Annett, Superconductivity, Superfluids and Condensates, (Oxford University Press, Oxford, 2004).
3. W. Buckel, Superconductivity- Fundamental and Applications, (VCH Weinheim, 1991).
4. D.L. Goodstein, States of Matter, (Dover Publications Inc., 1985).
5. H. Ibach and H. Lüth, Solid State Physics: an Introduction to Theory and Experiments, (Springer Verlag, 1990).