Dragomir, Sever S., and Nicoleta M. Ionescu. “Some Converse of Jensen’s Inequality and Applications”. Rev. Anal. Numér. Théor. Approx. 23, no. 1 (August 1, 1994): 71–78. Accessed November 22, 2024. https://ictp.acad.ro/jnaat/journal/article/view/1994-vol23-no1-art7.