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2. Higher Transcendental Functions;Erdélyi,1953
3. M. Abramowitz, and, I. A. Stegun, Handbook of Mathematical Functions, 10th printing, National Bureau of Standards, United States Department of Commerce, Washington, DC, 1972.
4. Tables of Integrals, Series, and Products;Gradshteyn,1980
5. A differential equation for the zeros of Bessel functions;Ifantis;Appl. Anal.,1985