Matković, Anita, and Josip Pečarić. “Refinements of Jensen-Mercer’s Inequality for Index Set Functions With Applications”. Rev. Anal. Numér. Théor. Approx. 35, no. 1 (February 1, 2006): 71–82. Accessed December 22, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2006-vol35-no1-art10.