1. Abramowitz, M., Stegun, I.A.: Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, 9th printing, Applied Mathematics Series, vol. 55, Nation Bureau of Standards, Dover, New York (1972)
2. Andrews, G.E., Berndt, B.C.: Ramanujan’s Lost Notebook, Part IV. Springer, New York (2013)
3. Burnside, W.: A rapidly convergent series for
$$\log N!$$
log
N
!
. Messenger Math. 46, 157–159 (1917)
4. Chen, C.-P.: A more accurate approximation for the gamma function. J. Number Theory. 164, 417–428 (2016)
5. Copson, E.T.: Asymptotic Expansions. Cambrigde University Press, Cambrigde (1965)