1. G. N. Watson, A Treatise on the Theory of Bessel Functions, Cambridge Univ. Press, Cambridge, The Macmillan Company, New York (1944).
2. V. S. Vladimirov, Equations of Mathematical Physics [in Russian], Nauka, Moscow (1981).
3. A. M. Sedletskii, “Analytic Fourier transforms and exponential approximations. I,” J. Math. Sci. (N.Y.), 129, No. 6, 4251–4408 (2005).
4. B. Ya. Levin, Distribution of Zeros of Entire Functions, Vol. 5, American Mathematical Society, Providence, RI (1980).
5. Yu. M. Berezanskii, Expansions in Eigenfunctions of Self-Adjoint Operators, Vol. 17, American Mathematical Society, Providence, RI (1968).