1. E. W. Hobson, "On the representation of a function by series of Bessel functions," Proc. London Math. Soc., (2), v. 7, 1909, pp. 359–388.
2. E. W. Hobson, The Theory of Functions of a Real Variable and the Theory of Fourier Series, Vol. II, Dover, New York, 1958. MR 19, 1166.
3. K. Knopp, Theory and Application of Infinite Series, Blackie, London, 1957.
4. E. C. Titchmarsh, The Theory of Functions, Oxford Univ. Press, London, 1939.