1. T. M. Apostol, Introduction to Analytic Number Theory, Springer-Verlag, New York, 1976.
2. R. Ayoub, Euler and the Zeta Function, Amer. Math. Monthly 81 (1974), 1067–1086.
3. R. Dwilewicz and J. Mináč, The Hurwitz zeta function as a convergent series, Rocky Mountain J. Math. 36 (2006), 1191–1219.
4. G. R. Everest and T. Ward, An Introduction to Number Theory, Springer-Verlag, Graduate Texts in Mathematics Vol. 232, New York, 2005.
5. G. H. Hardy and E. M. Wright, An Introduction to the Theory of Numbers, 5th edition, The Clarendon Press, Oxford University Press, New York, 1979.