Irawan, Rivanxander, Eridani Eridani, and Abdulloh Jaelani. “Ketaksamaan Hadamard Pada Fungsi Konveks”. Contemporary Mathematics and Applications (ConMathA) 2, no. 1 (May 20, 2020): 1–12. Accessed September 8, 2024. https://e-journal.unair.ac.id/CONMATHA/article/view/19295.