1. 1. A. Erdélyi, Higher transcendental functions, Vol. 2, McGraw-Hill, New York, 1953.
2. Diffraction of pulses by a circular cylinder;Friedlander, F. G.;Comm. Pure Appl. Math.,1954
3. Sur un formule d’inversion;Lebedev, N. N.;C. R. (Doklady) Acad. Sci. URSS (N.S.),1946
4. The asymptotic solution of linear differential equations of the second order for large values of a parameter;Olver, F. W. J.;Philos. Trans. Roy. Soc. London Ser. A,1954
5. The asymptotic expansion of Bessel functions of large order;Olver, F. W. J.;Philos. Trans. Roy. Soc. London Ser. A,1954