1. G. N. Watson, A Treatise on the Theory of Bessel Functions, Part 1 (Cambridge Univ., Cambridge, 1944; Inostr. Lit., Moscow, 1949).
2. A. Erdélyi and H. Bateman, Higher Transcendental Functions (McGraw-Hill, NewYork, 1953; Nauka, Moscow, 1966), Vol. 2.
3. V. S. Vladimirov, Equations of Mathematical Physics (Nauka, Moscow, 1981; Mir, Moscow, 1984).
4. A. G. Babenko, “Exact Jackson–Stechkin inequality in the space $$L^{2}(\mathbb{R}^{m})$$,” Trudy Inst. Mat. Mekh. UrO RAN 5, 183–198 (1998).
5. V. A. Abilov, F. V. Abilova, and M. K. Kerimov, “Some issues concerning approximations of functions by Fourier–Bessel sums,” Comput. Math. Math. Phys. 53 (7), 867–873 (2013). doi:
https://doi.org/10.1134/S0965542513070026