1. P. L. Bhatnagar and C. N. Srinivasiengar, The theory of infinite series, National Publishing House, Delhi, 1964.
2. T. J. I'A. Bromwich, An introduction to the theory of infinite series, 2d ed., Macmillan, London, 1926.
3. E. W. Hobson, The theory of functions of a real variable and the theory of Fourier's series, 2d ed., vol. 2, Cambridge, 1926.
4. C. A. Stewart, Advanced calculus, 3d ed., Methuen, London, 1951.