Dragomir, Sever S., and Nicoleta M. Ionescu. “Some Remarks on Convex Functions”. Rev. Anal. Numér. Théor. Approx. 21, no. 1 (February 1, 1992): 31–36. Accessed November 21, 2024. https://ictp.acad.ro/jnaat/journal/article/view/1992-vol21-no1-art4.