1. Abromowitz, M., Stegun, I.A. (eds): Handbook of Mathematical Functions, with Formulas, Graphs, and Mathematical Tables. National Bureau of Standards, Applied Mathematics Series—55, tenth printing (1972)
2. Andrews, G.E., Askey, R., Roy, R.: Special functions. In: Gierz, G., Hofmann, K.H., Keimel, K., Lawson, J.D., Mislove, M. (eds.) Encyclopedia of Mathematics and its Applications. Cambridge University Press, Cambridge (2000)
3. Bracciali, C.F., Sri Ranga, A., Swaminathan, A.: Para-orthogonal polynomials on the unit circle satisfying three term recurrence formulas. Appl. Numer. Math. 109, 19–40 (2016)
4. Baricz, Á.: Turán type inequalities for regular Coulomb wave functions. J. Math. Anal. Appl. 430, 166–180 (2015)
5. Baricz, Á., Štampach, F.: The Hurwitz-type theorem for the regular Coulomb wave function via Hankel determinants. Linear Algebra Appl. 548, 259–272 (2018)