1. C. Kittel, Elementary Statistical Physics, Wiley, New York, 1958.
2. On certain trigonometrical sums and their applications in the theory of numbers;Ramanujan;Trans. Camb. Phil. Soc.,1918
3. Note on Ramanujan's trigonometrical function cq(n) and certain series of arithmetical functions;Hardy;Proc. Camb. Phil. Soc.,1921
4. Expansions of arithmetical functions in infinite series;Carmichael;Proc. London Math. Soc.,1932
5. Some problems of Partition Numerorum; III: On the expression of a number as a sum of primes;Hardy;Acta Math.,1922