1. M. Abramowitz and I.A. Stegun Handbook of Mathematical Functions with Formulas Graphs and Mathematical Tables 10th Printing; United States Department of Commerce National Bureau of Standards (NBS) Washington D.C. 1972
2. G.B. Arfken, H.J. Weber, and F.E. Harris, Mathematical Methods for Physicists: A Comprehensive Guide, 7th ed., Elsevier; Academic Press, Boston, 2013.
3. B.C. Berndt, Ramanujan's Notebooks, Part I, Springer, New York, 1985.
4. Ramanujan-like series for
$$\frac{1}{\pi }$$
1
π
involving harmonic numbers
5. New series involving harmonic numbers and squared central binomial coefficients;Campbell J.M.;Rocky Mt. J. Math.,2019