1. G. E. Andrews, Number Theory, W. B. Sayders Company, 1971. Also Dover Publications, 1994.
2. M. Artin, Algebra, 2nd Edition, Prentice-Hall, 2011.
3. A. Ash and R. Gross, Elliptic Tales: Curves, Counting, and Number Theory, Princeton University Press, 2012.
4. A. Baker, A Concise Introduction to the Theory of Numbers, Cambridge University Press, 1984.
5. A. Baker, A Comprehensive Course in Number Theory, Cambridge University Press, 2012,