1. Madhava Rao, B. S. and Thiruvenkatachar, V. R. “On an inequality concerning orthogonal polynomials”Proc. Ind. Acad. Sci., 1949,29 A, 391–93.
2. Thiruvenkatachar, V. R. and Nanjundiah, T. S. “Inequalities concerning Bessel Functions and orthogonal polynomials,”Ibid.,, 1951,33 A, 373–84.
3. Danese, A. E. “Explicit evaluations of Turán expressions,”Annali di Mathematica pura ed applicata, Series, IV, 1955, Tome38, 339–48.
4. Venkatachaliengar, K. and Lakshmana Rao, S. K. “On Turán’s inequality for ultraspherical polynomials” (To be published inProc. Amer. Math. Society).