1. Inequalities and numerical bound for zeros of ultraspherical polynomials;Ahmed;SIAM J. Math. Anal.,1986
2. On a conjecture concerning monotonicity of zeros of ultraspherical polynomials;Dimitrov;J. Approx. Theory,1996
3. D.K. Dimitrov, On the behaviour of zeros of ultraspherical polynomials, in: General Seminar of Mathematics, Vols. 18–21, Academic Years 1991–1995, University of Patras, Greece, 1996.
4. Comment;Dimitrov;J. Comput. Appl. Math.,2001
5. On the behaviour of zeros of Jacobi polynomials;Dimitrov;J. Approx. Theory,2002