References
- Ifantis , E. K. and Siafarikas , P. D. 1985 . A differential equation for the zeros of Bessel functions . Applicable Analysis , 20 : 269 – 281 .
- Ismail , M.E.H. and Muldoon , M.E. The variation with respect to a parameter of zeros of Bessel and q-Bessel functions
- Watson , G. N. 1944 . A Treatise On The Theory of Bessel Functions , Cambridge : Cambridge University Press .