1. Pečarić, J., Proschan, F., Tong, Y.L.: Convex Functions, Partial Orderings and Statistical Applications. Academic Press, New York (1992)
2. Hardy, G.H., Littlewood, J.E., Pólya, G.: Inequalities, 2nd edn. Cambridge University Press, Cambridge (1952)
3. Sherman, S.: On a theorem of Hardy, Littlewood, Pólya and Blackwell. Proc. Natl. Acad. Sci. USA 37(1), 826–831 (1957)
4. Springer Series in Statistics;A.W. Marshall,2011
5. Agarwal, R.P., Wong, P.J.Y.: Error Inequalities in Polynomial Interpolation and Their Applications. Kluwer Academic, Dordrecht (1993)