1. On Certain Dual Integral Equations
2. The solution of a pair of dual integral equations
3. G. N. Watson, A Treatise on the Theory of Bessel Functions, Cambridge University Press, Cambridge, England, 1944, 401–MR00107460063.08184
4. E. T. Whittaker, G. N. Watson, A Course of Modern Analysis, Cambridge University Press, Cambridge, 1920, 229–
5. On the Solution of Simultaneous Dual Integral Equations